Atma Xplorer

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[Guide] Downgrade your PSP to any 6.xx OFW

If you have updated your PSP to 6.38 OFW or 6.37 OFW or even the latest PSP firmware, 6.60 OFW and found yourself without a Hen or CFW that’ll allow you to run homebrew or free PSP games well you’re in luck!

PSP developer some1 (yes, that’s his handlename, don’t ask why) has released a Signed downgrader that will allow you to downgrade your PSP from 6.38 to 6.20. While it is a port of Davee’s original downgrade for 6.3x to 6.20, some1 managed to make it work for 6.38 OFW, the current latest firmware available for the PSP. It should, in theory, still work for downgrading 6.35/6.31 to 6.21 but some1 says he hasn’t tested it so try at your own risk.

Update: updated to v4 of some1’s downgrader which now supports 6.60 OFW
Important: Some PSP’s can’t be downgraded beyond 6.3xx, spefically0 8g and 09g models.
Important update: some1’s downgrader officially supports:


How to Downgrader on your 6.xx PSP

Important Note: If you chose to downgrade to 6.20, you will get a BSOD (saying that your system information is corrupted), this is OK, just click circle to reset your system information and you will be back to normal.

  • Extract the OFW zip file on your PSP
  • Copy the resulting folder to x:\PSP\GAME\UPDATE (x is your memory stick or the PSP Go‘s storage)
  • Extract the 6.xx Downgrader file on your PSP
  • Copy the 6.xx Downgrader v4 folder into PSP/GAME/
  • Run the downgrader from the XMB
  • Follow the instructions and then wait for it to boot the OFW Update
  • When PSP Reboots press O to reset settings
  • Congratulations, you have successfully downgraded your PSP.

If you’re wondering what to do after downgrading, you can install the latest pro LCFW build like 6.20 Pro-B8, 6.35 Pro-B8 or 6.39 Pro-B8.

Some1 for the 6.38 Downgrader
To Davee for making the original 6.35/6.31 downgrader
To ultimakillz and skyend for being my mentors when I first entered the scene.
To n00b81 for teaching me a lot of things.
To Davee, Freddy, TheLemonMan, Hellcat, and Draan for answering any question’s I’ve had.
To TiPi and Nymphaea for allowing me to work on their VSH sploit, which gained me alot of knowledge and experience.
To Npt for hosting such an awesome competition!
And to many others that I’m probably forgetting.


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Comments ( 82 )

Have Something To Say ?

  1. bittu.pradeep pradeep May 24, 2011 Reply

    i was’t able to downdrade error md5 mismatch please help me with this .

    • atmaxplorer sylv3rblade May 24, 2011 Reply

      This is a common problem. What PSP model do you have and what firmware did you download (from the links?) Also, is your PSP an EU or US or JPN model?

  2. bittu.pradeep pradeep May 24, 2011 Reply

    psp3004,jpn model

  3. samadhia Sam May 24, 2011 Reply

    Can u help me to get upgrader from 6.37 OFW to 6.38 OFW?? since now when i try 2 upgrade it officialy tru PSN , the upgrader i got is for 6.39 OFW.
    Can u help me?? from where can i Dl the upgrader to 6.38 (btw my psp are 3000series)

  4. nikkie_nicks.cute nixx22 May 26, 2011 Reply

    sylv3rblade wer can i download Total_Noob’s 6.20 TN-E and the Prometheus ISO loader

  5. josenovoa13 JOSE June 17, 2011 Reply

    how do u get it from winrar into ur psp

  6. brandon_heat BrandonHeat July 3, 2011 Reply

    I tried using the downgrader to go from 6.39 which has pro b6 firmware installed currently to 6.20 but the downgrader gave me a md5 mismatch error. How do i remedy this?

  7. fireskecher fireskecher July 5, 2011 Reply

    my psp model is 1000 . it can be downgrade?
    now my OFW is 6.39, and i cannot play any games , when i played the games, i cannot control some button and cannot press home button,please help me

  8. djc_1991 NewTOThese July 8, 2011 Reply

    I downloaded the downgrader and the FW . Extracted both of them , copied the resulting folders on the folders assigned . Yet, when I try to run the downgrader by XM8 , it wont because it says ‘Corrupted Data’ . Does this mean my PSP is not hackable anymore? I bought it within this month . Has a 6.39 FW , PSP3000 . Im on this step ‘Run the downgrader from the XMB’ . I cant move forward because the psp says both of them are corrupted . Help me please . Hayyyy..

    • atmaxplorer sylv3rblade July 8, 2011 Reply

      Please ensure that the downgrader is at PSP/GAME otherwise you’ll really get the corrupted data error

  9. djc_1991 daniel john carig July 9, 2011 Reply

    yes it is inside the E:PSP/GAME folder , still the same . By the way the PSP is PSP3001 , saw it under the psp . I dont know why is this happening awww

    • atmaxplorer sylv3rblade July 9, 2011 Reply

      Can youpost a screenshot of the folder’s location and it’s contents?

  10. djc_1991 NewToThese July 9, 2011 Reply

    Hey forget about what I just posted . I’ve already done that . Noobie error . So I’m to the next step , now its saying upgrader md5 mismatch error . Im using 6.39 FW . I also tried the version 2 of the downgrader, it just wont downgrade too . Thank You .

    • atmaxplorer sylv3rblade July 9, 2011 Reply

      Which OFW are you downgrading to and what is your PSP model?

  11. djc_1991 NewToThese July 9, 2011 Reply

    Currently im using 6.39 OFW , trying to downgrade to 6.20, of course . How to solve this problem? I saw someone at the top having the same problem like me , I wonder if he fix it? that md5 mismatch error…..

  12. djc_1991 NewToThese July 9, 2011 Reply

    its PSP3001 , lol can we have a chat on YM or any other , say , like facebook ? this one’s taking too long already

    • atmaxplorer sylv3rblade July 9, 2011 Reply

      Try downgrading to 6.35. You may have one of the newer PSPs that can’t be downgraded below that.

  13. djc_1991 NewToThese July 9, 2011 Reply

    Is there a guide/tutorial for doing that? Can I have the link please? Thanks.

    • atmaxplorer sylv3rblade July 9, 2011 Reply

      You can use this tutorial for that >_> just be sure to download the OFW for 6.35 and not 6.20. It’s in the links provided in the post

  14. djc_1991 NewToThese July 9, 2011 Reply

    Oh just watched a youtube video , I now know my psp model , its 09 (zero-nine) , the video also said I can only downgrade as low as 6.35 . I need the tutorial for that .

  15. cascdestorm Samuel Gair July 20, 2011 Reply

    Ok,where it says extact the FW to your psp, what FW does it mean? I thought it meant the downgrader but now I am not sure since I can get this to work

  16. jacksonbrockett Jackson July 26, 2011 Reply

    I have a psp 3001 and when i run this application it says error md5 mismatch i have it in psp/games and i have the 6.20 update in psp/update. What am i doing wrong?

    • atmaxplorer sylv3rblade July 26, 2011 Reply

      You may have a PSP that can’t be downgraded to 6.20. Have you tried using PSP Ident?

  17. marlon_conde24 marlon August 1, 2011 Reply

    while im running the downgrader it says . error opening ms0:/PSP/GAME/EBOOT.PBP
    WHAT’S THiS ??

    pls help my psp is 2004

    • atmaxplorer sylv3rblade August 1, 2011 Reply

      Do you have the OFW copied to the right directory?

      • alagappan_ece Qian August 6, 2011 Reply

        Even i tried the same on V6.39, it’s showing Corrupt data.
        I kept the 638 Downgrader\EBOOT.pbp on the location :/PSP/GAME/UPDATE/EBOOT.pbp.
        It’s throwing corrupt data error.
        What i have to do on this front.

        • atmaxplorer sylv3rblade August 6, 2011

          Errm you’re supposed to copy the downgrader into :/PSP/GAME/. The OFW goes into :/PSP/GAME/UPDATE/

      • alagappan_ece Qian August 7, 2011 Reply

        Even i tried that option too.
        Put the EBOOT.pbp on :/PSP/GAME/.
        Still showing corrupted data.

        • samadhia Sam August 8, 2011

          Try dowload the OFW again or try to find it from other place. I once got this problem.
          I download 6.20 OFW from here when i try 2 run it, it always say Corrupt data error. (on my psp 3001)

          So i try dl from another source (i forgot where) and it work.

          NB: The same 6.20 OFW i download from here work fine with my girlfriend psp 3004. don’t really know why it happen.

  18. juanpspgo2009 Juanpi August 13, 2011 Reply

    i got
    psp go
    6.39 pro b8
    will it work???
    please tell me

  19. dark_Rogue14 fanoffemdom14 August 17, 2011 Reply

    im getting an md5 error too. i have a psp go with 6.39 pro b 8. thanks for the help.

    • atmaxplorer sylv3rblade August 18, 2011 Reply

      Your PSP is probably one of the new version 3000 and can’t be downgraded to 6.20. Try downgrading to 6.35 instead.

      Ninja edit: scratch that, didn’t read all the way through your comment. To what OFW version are you downgrading to?

      • samadhia sam August 19, 2011 Reply

        About This md5 error, i keep reading the people who asked always say “my firmware 6.39 Pro B 8” Could it be people really run the downgrader from 6.39 Pro series?? maybe that the problem?
        Just reminder that the downgrader only work with 6.3X OFW, in other way do not run u’r 6.29 Pro b series FW, check your sistem it make sure it say “6.29” not “6.29 Pro B X”
        maybe that will solve the problem.
        Been using this downgrader over about 5 diff PSP and it’s worked fine in my case

        • atmaxplorer sylv3rblade August 19, 2011

          I think that maybe the case.. I’ll add another point to revert to OFW first. Thanks

  20. domenicomario.loi Imago August 29, 2011 Reply

    I have got a PSP 3000 with Module 03g, Secret code 89xxx and on the box there is the letter A with a black dot.
    Can I downgrade it from 6.60 to 6.39 or I will brick it?
    Thanka and sorry for bad english!

    • atmaxplorer sylv3rblade August 29, 2011 Reply

      Regardless of your PSP’s model, you can downgrade it to 6.39. The only real danger is upgrading to something lower like 6.20 but since your PSP is 03g, you can even downgrade to that. Do note that the downgrader has safeguards in place to prevent accidental brickings from an incompatible firmware.

  21. dennisumlas noob August 31, 2011 Reply

    mine says the game could not be started (80010002) -_- my version is 6.60 pro B-9 i tried to downgrade it to 6.35 -_-

    also am i the one to create the folder update ? my psp doesnt have update folder when i open the games folder

    ps sorry for the noob questions -_- this is my last question

  22. Magus_Zeal Magus_Zeal September 9, 2011 Reply

    Hello sylv3rblade, First off let me say that you are awsome and doing a wonderful job for the hacking community and us “gamers” that are just trying to unlock their PSP for personal enjoyment and the sake of completely customizing every aspect of the device. I had a quick question, after some research, i am almost positive that i own the 3001c brite model of the PSP. after purchasing and upgrading to 6.60, i WAS having issues downgrading to 6.20 .. but, after reading some posts, and with you being as right and awesome as ever, my psp would not go as low as 6.20. worked just fine downgrading to 6.35 tho. now on to the next step.. installing the CFW.

    • atmaxplorer sylv3rblade September 9, 2011 Reply

      There is currently a downgrader that will allow you to downgrade to 6.20 but as it is still a development build and in need of more testing, a lot of users are having issues. Still I would highly recommend 6.35 and any LCFW (particularly the latest PRO build, 6.35 PRO-B9) for your CFW needs.

    • Jin080895 JinKazamaInLivingFlesh December 21, 2011 Reply

      Let me start off by saying your doing wonders for the psp community. Here’s my question, is there any possibility that my psp can be bricked by downgrading I have a psp 3001 and I’m trying to downgrade from 6.60 OFW

      • atmaxplorer sylv3rblade December 21, 2011 Reply

        There is always the possibility of bricking when upgrading/downgrading. Since there is a PRO LCFW release for 6.60 OFW, I would recommend that you install that instead of downgrading unless you really want to.

  23. ppeenn Kyra Armageddon September 24, 2011 Reply

    When trying to downgrade (PSP3004) 6.38 to 6.20 it stopped with the error that my version is higher and an update wasn’t nessicary.

    I’m now trying with the 6.35 OFW, but I thought i’d let you know in case you can do anything with the info.

    • ppeenn Kyra Armageddon September 24, 2011 Reply

      Looks to work fine with 6.35. Thanks!

  24. blue_knight108 Stephanie October 4, 2011 Reply

    I’m having a corrupt data problem…tried restoring all settings, rebooting, and nothing. I have the downgrader and the OFW in the right place, and it still throws me a corrupt data error. What should I do?

    • atmaxplorer sylv3rblade October 4, 2011 Reply

      Please check if the files are in the proper directories

  25. lingjai_net lingjai October 19, 2011 Reply

    hi, i have a psp 2000 which has previous CFW 3.71 M33-3 but was updated to a OFW 6.60. will this downgrader work with this? please help. tnx in advance.


  26. lingjai_net lingjai October 19, 2011 Reply

    sylv3rblade, pa help po! my psp 2000 (02g) na dati my 3.71 M33-3 na CFW kaso napa update lately ng OFW 6.60 sa psp mismo. tsaka nabasa ko na sabi nyo yong downgrader eh from 6,60 to 6.xx gnun lang. Tsaka may nabasa ako sa forum na untested pa to 5.xx in belw na FW. anu maganda gawin at maging pwede ISO/CSO sa psp. Maraming salamat in advance!

  27. lingjai_net lingjai October 20, 2011 Reply

    Ah ok. Ill try the the PRO one. ive tried the 6.60 ME 1.6 but wont work. tns for the suggestion.

  28. lingjai_net lingjai October 20, 2011 Reply

    i just run intothis problem while updating to PRO. the pro update went fine kaso the screen freeze up after running the RECOVERY file. The buttons wont work. left, right or up , down. L and R. the vsh menu even appeared yet the buttons wont scroll up down to select the menus. what shall i do? thanks again.

  29. marv_sosa marvin November 24, 2011 Reply

    Hi, I have a new psp v.3001 running on 6.60 OFW and i tried downgrading to 6.39, but a message appears saying “a later version of the system software is already installed, no need to update”.

    Any tips??

  30. ajaydavegun Ajay December 5, 2011 Reply

    This is what I did. I put the Downgrader into

    THEN I put the OFW into PSP>GAME>UPDATE


    I have a psp-3001 on ofw 6.60

  31. tolentino.rein kamijo December 5, 2011 Reply

    Greetings admin! I have a PSP-3004 w/ 6.60, will this downgrader work in my psp? And what FW will you suggest (that’s able to play 3rd bday, nba 2k12, and some new games)?

  32. shuntea.robertson tayter_tot January 16, 2012 Reply

    I’m having trouble w/downgrading using the 6.xx_Downgrader_v4. Every time I run the setup from my XMB, I see the PSP Splash screen, then I get a message saying my psp model is a 3g, please wait. Then the disclaimer comes up and to press x to start SCE updater. So, I press x, but the screen just goes blank and takes me back to the PSP Home Menu…..Can you help me please…?

    PSP 3001 3g
    6.60 OFW

    I want to downgrade to 6.39

  33. rottenskin7 Greed101 March 30, 2012 Reply

    Hey can you help me, im having a problem hacking my psp 3000 6.60 i tried hacking it with Pro-b9 and b10 but it doesnt work my psp shows that it is a model 09g. I’ve read other post and try downgrading my psp but it also shows “it could be started due to code 80010002”.. plz help.. plz reply asap

    • atmaxplorer sylv3rblade March 31, 2012 Reply

      I won’t recommend downgrading a 09g since you’ll encounter problems upgrading it (if you want to do so in the future). What problems are you experiencing when installing B9 and B10?

  34. rottenskin7 Greed101 March 31, 2012 Reply

    The problem is when i hacked it with either PRO-b9 and b10.. the games doesnt appear.. if i connect my psp to my laptop it only shows the psp and game folder and nothing else.. when i checked the system information my mac address is gone it says “model 09g” is that normal with the pro?? Plz help.. im a little confused..

    • atmaxplorer sylv3rblade April 1, 2012 Reply

      did you place the ISO files in the right folder? They’re supposed to go in X:\ISO otherwise they won’t appear.

  35. rottenskin7 Greed101 April 1, 2012 Reply

    oh.. so i have to make the folder.. dammit.. thanks sylv3blade

  36. horsedude1999 johnny m. May 10, 2012 Reply

    hi, i followed the instructions, extraceted everything. i am trying to go from 6.60 ofw to 6.39 ofw. i followed the instructions. but when i click on the downgrader it ends up sayin ” A later version of the system software is already installed. there is no need to update. (CAAFFFFFCF7). i click back and behind the erro message it show the update for 6.39 and start. What am i doing wrong? please write back. thanks

  37. horsedude1999 johnny m. May 10, 2012 Reply

    also whenever i copy the 6.xx Downgrader v4 to my psp, it says there is no encryption do i want encryption i just clicked no.

  38. horsedude1999 johnny m. May 10, 2012 Reply

    the code on my psp box says. PSP-3001XPB / 98898 If that really matters at all

  39. horsedude1999 johnny m. May 12, 2012 Reply

    what did i do wrong, i followed the instructions, did the 6.xx Downgrader v4 folder need to be encrypted or something

  40. namariboshi Frank May 12, 2012 Reply

    aw… after running the downgrader i get the following message : The game could not be started (80010002) 🙁

  41. namariboshi Frank May 12, 2012 Reply

    nevermind I was being dumb, its working perfectly fine

    • ajdmng Airell May 31, 2012 Reply

      How you fix it bro? Need help.

  42. ajdmng Airell May 31, 2012 Reply

    The could not start it says. Help please?

    • ajdmng Airell May 31, 2012 Reply

      I mean the game could not be started. Help please?

  43. ajdmng Airell May 31, 2012 Reply

    Where XMB located?

  44. metavox metavox August 20, 2012 Reply

    hi, i have one LPTFFFFFFFE error when the downgrade goes on 89%!
    i have a 3004 OD (date code) psp..

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