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Install PSP Custom Firmware 5.03 Prometheus add-on

If you had 5.03 GEN-C and you’ve probably experienced having problems playing games with Sony’s new DRM which requires 6.20 OFW. Luckily, Liquidzigong created Prometheus Module so that users with 5.03 GEN-C (meaning COMPLETELY hackable PSPs) can still enjoy the latest game releases without any patching involved. With this guide, I’ll be showing you how to install the 5.03 Prometheus firmware add-on .

For ease of identification, Liquidzigong says you can also call this release as 5.03 Prometheus Add-on

Important: This only for hackable PSPs. Not sure? Read: Is my PSP hackable?

Update: The Prometheus-3 add-on is now available.


  • A PSP with custom firmware 5.03 GEN-C installed. If your firmware version is below this, please update to 5.03 GEN-C.
  • PSP battery that’s at least 78% full
  • Download:
  • Disable ALL plugins.
  • Back up your save files (so that if they get corrupted, you still have backups)

How to install 5.03 Prometheus add-on

  • Connect your PSP to your computer
  • Extract the to your PC
  • Copy the 5.03_Prometheus folder to X:/PSP/GAME/ on your PSP’s memory stick. (Where X is the drive that your PC recognizes your memory stick)
  • On your XMB, go to Game > Memory Stick, hold the L trigger and press X to start 5.03 Prometheus Updater
  • Continue to install the official 5.03 Prometheus CFW when prompted
  • After all process is complete, press X again. Your PSP revert to the XMB screen.
  • Congratulations, you’ve just installed 5.03 Prometheus add on on your 5.03 GEN-C.

Important: This release is currently 5.03 Prometheus v4. Stay updated by subscribing to our feeds.
Update: The Prometheus-3 add-on is now available.
After installing 5.03 Prometheus, How about some Free PSP Games?


In case of problems you can go back to 5.03 GEN-C by simply running ChickHen R2 then 5.03 GEN-C again.

You can post problems you’ve encountered here.

Developer Notes

  • Repair 2000v3 not work problem.
  • Check adding firmware 5.03 .
  • Analysis of the custom key file restoration process in the small problem .
  • Fix crash when unloading the issue , amendment reboot show .
  • Uninstall the original version of file recovery 5.03 .
  • After the MAC address MAC fix hidden display for the gaps .
  • Brush the former increase the frequency to 333/166 .
  • Prometheus module and has been used to improve the game ‘s compatibility
  • Optimize application performance and size
  • Amendment SysMemUserForUser_91DE343C possible problems


Liquidzigong – Prometheus Module

Genyus – By GEN

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Comments ( 45 )

Have Something To Say ?

  1. christian_andan Christian June 27, 2010 Reply

    if i have this installed, can i play Prince of Persia the Forgotten Sand?..coz you know, the game could not be started when i tried to play the game..5.03 Prometheus is already installed on my PSP 3000 that has previously installed 5.03 Gen C

    • atmaxplorer sylv3rblade June 27, 2010 Reply

      Yes it will work but you need to play a non-patched version of the game.

  2. neoconsole ipad case June 30, 2010 Reply

    just to confirm , it works flawlessly , thanks for the info! oh , unpatched one works

    • laudm laud September 12, 2010 Reply

      what psp have u got

  3. jae.artattack Z3TR0C July 4, 2010 Reply

    I have Prometheus 5.50 and can’t play the new Prince of Persia title. Do I need the non-patched version as well? How can you tell if it’s the non-patched version? And is there a fix so I can get on the PSN? I want to be able to use remote play but can only do it on my own network since PSN won’t allow me to log in.

  4. jae.artattack Z3TR0C July 5, 2010 Reply

    Oh ok thank you. I did manage to find a kbbhs plug in that came WITH a Prince of Persia Forgotten Sands torrent, installed the patch and it works just fine now. I’ve actually never seen a title labeled as “untouched” or “unpatched”, now I’ll know if I ever do! lol. Also, I had problems with 3 Lego Harry Potter torrents tho…they wouldn’t show up on the memory stick after install. Is it a problem with ME or were they “fake” as stated by people in the comments? I did manage to find a working title tho finally. I’m headed on to try to find a PSN plugin now..any suggestions? Could you post a link by chance? I may be able to find one but just in case….

    Thanks for all your help Sylv3rblade, I truly LOVE this site! I learned about the pandora battery and ALL of the cfw from here! Your step by step instructions are the best by far! Thanks again!

    • atmaxplorer sylv3rblade July 6, 2010 Reply

      Thanks for bearing with me as not as active as usual since I’m still quite busy ._.
      Congrats on Prince of Persia, I had to dl the game six times to get it working :(. As for Harry potter, haven’t tried although it’s prolly fake. As for the PSN plugin, will look into in when I get free from work 🙁

  5. jae.artattack Z3TR0C July 5, 2010 Reply

    Hmmmm…..the torrent comes up as “Unable to load “easy_patch-3.rar”Invalid torrent file”

    I do have a working patch tho….unless this one was a newer version.

  6. smile011380 thea July 16, 2010 Reply

    hi. one question, you mentioned above to just press X to reboot the psp but on the screen there are 3 choices to press aside from X, what is the purpose of the other choices? thanks

    • atmaxplorer sylv3rblade July 16, 2010 Reply

      Oops my bad, the PSP won’t reboot. Just revert to the XMB.

      As for the other choices, they are either to uninstall the prometheus add-on or to exit the installer.

  7. smile011380 thea July 17, 2010 Reply

    I didint press the L when i started installing prometheus i just press X then it reboot. i went to system when i saw 5.03 prometheus, does this mean i successfully installed it even i didnt press L? when i tried to play price of persia, it didn’t start. what could be the problem? thanks.

    • atmaxplorer sylv3rblade July 17, 2010 Reply

      Just like with other 5.03 cfw, pressing L only overwrites the files already there.
      As for why PoP didn’t play, you probably have a patched/fixed version. Try looking for an unpatched or unfixed ISO version.

  8. ljcave21 lee July 19, 2010 Reply

    i’m on 5.03 gen-b psp 3000 ta-090v, anyone can guide how to run prince of persia forgotten sands?

  9. loo lol August 20, 2010 Reply

    pressing L when pressing X? that was my only problem?

    GEEZ.. I was going nuts for 3 days to work promteus. I wish I could find this site at the beginning. thanks.

  10. smile011380 thea September 17, 2010 Reply

    hello. can you help me where can i get a free prince of persia unpatched? i cnt play kingdom hearts in my psp if i have the khbb. please help me. i want the 2 games in my psp n i only have 1 memory card. thanks in advance

  11. burai_break K' E' September 29, 2010 Reply

    About the KH: BBS, is it must an ISO, or it can be a CSO?

  12. burai_break K' E' September 30, 2010 Reply

    okay, I have tested the prometheus addons, but when the installer started and I press X, nothing happened. can you help me? my FW is 5.03 gen-c, before this one mine was 5.50 gen-d2

    • atmaxplorer sylv3rblade October 2, 2010 Reply

      What do you mean by nothing happened? After installing are you still on 5.03 GEN-C?

      If the patch was successful, you should see your firmware version as 5.03 Prometheus now.

      Watch this vid of the installation:

      • burai_break K' E' October 3, 2010 Reply

        No, not like it’s patching. So it’s like, the program itself is working, but when there are 3 options (X to patch, R to exit, blah blah), when I tried to press X, it’s just freezing. I already tried so many times, but no response. Can you help me, please?

        • zechs_ookami EXZech February 19, 2011

          I think I have the same problem as K’ E’. Let’s go step by step. First I turn on my PSP3000 fresh (without hack – Version 5.03). Then I run chikenR2. After that, I run the Gen-C Full patch. Up until here it’s still fine. When i checked the sys info, it reads 5.03 Gen-C Full. Okay, here when it get’s wierd. I hold down the L button, and X on the 5.03 Prometheus-3 V2 patch. Without releasing the L button, the install menu of prometheus pops up. I gives 3 options. X to install, O to uninstall, and R to exit. I use all/any of the three options, and nothing happened. But if I release the L button I am holding, the PSP will freeze. I have the new game Lord of Arcana [USA], and Monster Hunter 3 Portable that i’m looking forward to, so I hope you can give me some hand. Thank you very much.

        • atmaxplorer sylv3rblade February 19, 2011

          It seems to be a bug with this version of the Prometheus module. Try using the newer version:

        • zechs_ookami EXZech February 19, 2011

          About the later comment, and after several trials, now i do understand and manage to work it out. The notes BATT MUST BE OVER 78%, really is important.

  13. burai_break K' E' September 30, 2010 Reply

    it’s like freeze

  14. atmaxplorer sylv3rblade September 30, 2010 Reply

    Why did you downgrade from 5.50 GEN-D2 to 5.03 GEN-C? The upgrade path for you should be 5.50 GEN-D3 then 5.50 GEN-D4.

  15. burai_break K' E' September 30, 2010 Reply

    can 5.50 gen d3 installed in psp 3000?

  16. burai_break K' E' October 1, 2010 Reply

    Sorry, my bad. Before 5.03 gen c, mine was gen b. My bad. But, in the system information, it was written 5.50 gen d2. Do you know why? And what about my first question about the prometheus?

  17. smile011380 thea October 2, 2010 Reply

    hi. you haven’t answered my question. please help! can you help me where can i get a free prince of persia unpatched? i cnt play kingdom hearts in my psp if i have the khbb. please help me. i want the 2 games in my psp n i only have 1 memory card. thanks in advance

    • atmaxplorer sylv3rblade October 2, 2010 Reply

      Prince of Persia and Birth by Sleep is here if you want 🙂

      • burai_break K' E' October 2, 2010 Reply

        Say, I’ve already tried many times and the prometheus keep freeze. I already tried holding the L trigger and not holding the L trigger, but none works. Can you help me please?

        • atmaxplorer sylv3rblade October 2, 2010

          Errm. Prometheus should decrypt it on the fly and it will work the same as the khbbs. However since it doesn’t seem to be working here’s a couple of solutions.
          You can either download this version of the game Prince of Persia. It’s listed as working on all CFW with prometheus modules or khbbs.
          Download 5.00 M33 Patched version here (torrent file). This one is guaranteed to work since it’s patched for the older 5.00 M33 firmware.

  18. smile011380 thea October 3, 2010 Reply

    hi i downloaded the POP you’ve gave but stil i doesn’t work. if i will install the khbb birth by sleep wont play. it seems the two games can’t be together in 1 memorycard that will both work. is that the final conclusion for this? please help, how can i run both games in my psp 3000 wid prom version in 1 memory card? thanks in advance

  19. smile011380 thea October 16, 2010 Reply

    hello i downloaded the POP you’ve gave but stil i doesn’t work. if i will install the khbb birth by sleep wont play. it seems the two games can’t be together in 1 memorycard that will both work. is that the final conclusion for this? please help, how can i run both games in my psp 3000 wid prom version in 1 memory card? thanks in advance

  20. pichi_snow pichisnow October 20, 2010 Reply

    Can I shut down the psp instead of leave it in sleep mode?

    • atmaxplorer sylv3rblade October 22, 2010 Reply

      You still need to put it to sleep. You simply can’t allow your PSP to turn off.

  21. jaysome27 jay October 23, 2010 Reply

    hi po sir silver gus2 ko po sana upgrade ng prometheus ung sakin kaso naka gen-c dt ung 3k ko pwede po ba sya upgrade my chance ba na ma brick ung psp q

  22. smile011380 thea October 24, 2010 Reply

    hello. pasagot naman tanong ko sa itaas. thanks. meron kba alam pwede kunan nung zuma psp na bago? release yung ng august 2010 pero wala me makuha download. thanks

  23. ianmochtar Ian March 13, 2011 Reply

    How I can install the prometheus 5.03 GEN-C

  24. josephpasag Cool Caleb May 18, 2011 Reply

    successfully installed, as always silverblade always gives us installation details. nice work. ^_^

    just a quick question though, i can revert back to 5.03 gen-c right? as long as i have the patcher on my psp?

    i’m concern about the saves though, i forgot to put back ups. are my saves okay? i mean as long as i don’t touch them when i’m in 5.03 prometheus they’re okay right? i patched to prometheus to play the 3rd birthday, other than that i don’t play my other games.

    thanks a lot and more power ^_^

    • atmaxplorer sylv3rblade May 18, 2011 Reply

      Yep, you can always revert to just 5.03 GEN-C. As for your saves, so far, the only save corruption that I’ve known to occur is with 5.00 M33-6 and lower so you’re more or less safe.

  25. teeceechow tee July 2, 2011 Reply

    PLS HELP!!! i have a psp3000 and its hacked -> 5.03 Prometheus-3 . (*System Software: Version 5.03 *I see so many people talking and giving solutions for 5.03 ChickHEN R2 or something similar online, my psp hacked version does not contain the “ChickHEN” thing and i have never seen it on my psp, I am very confused now) My problem is that I just did a full shut down on my psp and when i turn it back on, all my games are gone, i can only see the “5.03 Prometheus” now. Please help!! What should I do now?

    • atmaxplorer sylv3rblade July 3, 2011 Reply

      You have unloaded chickHen and therefor can’t run 5.03 GEN-C or games. To easily reinstall, just follow the instructions on this post: Signed 5.03 GEN-C then install the prometheus module

  26. keropoks11 psplost October 28, 2011 Reply

    i got a psp 3006 it got cfw 5.03 Gen C Full before this i could play latest game on it Kingdom heart BBS, Pes 2011. wwe smackdown 2011, patapon 2 and currently could play patapon 3 aswel but what weird is lately like 3 or 4 weeks ago i got problem such as psp cant detect my memory card, when i play pes or other game that usually played well before hung and then reboot… etc… so i had to do the L2 R2 down in the picture (i guess its called chickhen right?) then click Gen C all over again.. is this because the CFW Gen C Full need to be upgraded?

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