Posted by 
October 18, 2008 •
Custom Firmware 5.00 M33 has just been released. Dark Alex completely skipped 4.02 and released 5.00 M33. Interested in the changes? Read the PSP 5.00 OFW changes. The most welcome change to 5.00 is the full QUERTY keyboard. No more cellphone like input for us ^_^.
Note: If you’ve already install 5.00 M33, you can skip to it’s patches on the next page. The latest patch is 5.00 M33-6.
Important UPDATE: If you are having trouble playing the latest PSP Games, you may want to install the Prometheus-4 module or use the ISO Tool Patching guide. OR you may want to update to 5.50 GEN-D3 
Requirements:
- PSP Phat or PSP Slim with 3.52 M33 or higher. If you don’t have custom firmware yet, READ: Convert your PSP to custom firmware.
- PSP battery that’s at least 78% full
- Download: 5.00 M33 | 5.00 M33
- Download: 500.PBP | 500.PBP
- Disable ALL plugins.
- Back up your save files (so that if they get corrupted, you still have backups)
How to install 5.00 M33 CFW on your PSP:
- Extract the 5.00 M33 installer files to your computer.
- Copy the Update folder to X:/PSP/GAME/ on your PSP’s memory stick.
- Download the official 500.PBP. Rename the EBOOT.PBP to 500.PBP before proceeding.
- Copy the 500.PBP to the directory; X:/PSP/GAME/UPDATE on your PSP’s memory stick.
- Disconnect your PSP
- Run 5.00 UPDATE from under Game on your PSP’s XMB
- Press X if asked to correct idstorage keys
- Continue to install the official 5.00 SONY when prompted
- After all process is complete, press X. Your PSP will reboot.
- Congratulations, you’ve just installed 5.00 M33
STOP!!!
If you haven’t successfully installed the 5.00 M33 firmware then you can’t proceed here since these are just subsequent patches. Read the guide on How to install 5.00 M33 on your PSP above or if you have official firmware, post a comment and let’s see if I can help you out.
If you want to upgrade your 5.00 M33-6 then turn to the next page.
can i install this on my psp phat 1000 with a firmware of 3.71 m33-4? or do i need any cfw before i install this? thanks
For some reason my psp will randomly turn off and on, no matter if my memory card is in or not. i tried different batteries and still the same thing, removed the battery and just used the ac adapter and still nothing…. what can i do to fix my psp 1000 running Cfw 5.00 M33?
It could be a bad flash or a hardware problem
Have a technician check it up.
will this work on psp 1000 phat
Please read this guide to install CFW on your PSP:
http://www.atmaxplorer.com/2009/07/convert-your-psp-to-custom-firmware-without-pandora-battery/
ofw 5.00
i have OFW 5.03. i can do this correct? or do i have to be lower than OFW 5.00?
If you have 5.03 then you’re better off reading this guide:
http://www.atmaxplorer.com/2009/07/convert-your-psp-to-custom-firmware-without-pandora-battery/
do i need a pandora battery to do all these process??????????????
Your link for the 5.00 m33 download is broken
Upped to a new mirror
I just installed GEN_A_Update 5.50 on my psp 1000 japanese. I am now trying to install gen_b 5.50 but am always getting data corrupt message. What should i do? By the way the psp had 5.02 before update
The 5.50 GEN-B installation files that you have downloaded is probably corrupted. Try redownloading again.
Pls give me your good link for 5.5 gen b
I updatd japan psp 1000 from 5.02 to 5.50 gen A. Now gen b is giving data corupt. How do i solve it? I hav already tried redownloading
Well since you’re already on 5.50 GEN-A, why not go forward with 5.50 GEN-D3?
http://www.atmaxplorer.com/2009/12/install-psp-custom-firmware-5-50-gen-d3/
Hey..i notice that, although i installed gen-A, the psp is showing just 5.50 in system information. Shouldnt it show 5.50 gen-a?
Errm my guess is that you selected install OFW instead of install CFW during your installation of 5.50 GEN-A.
You’re going to need a pandora battery to downgrade your PSP now
I can’t seem to get my Pandora + magic to downgrade the fat psp …..it keeps going from 68-99 looping …
I have already installed Custom Firmware 5.50 GEN-3D in my 1000 PSP, but i have to format my memory card due to virus problem. Even i didn’t back up my previous file. Do I need to re install the firmware again??
Right now i download the 5.00 M33 CFW and installed as you have written. But when ever i tried to run that file the message pop up saying that “This game cannot be started. The data is corrupted.” I had download the file twice and tried but still i m getting the same message. Please help me. Right now I have System Software Version 5.50 in my system information. Thank You.
How did you install 5.50 GEN-D3 in the first place? By using ChickHen? Either way, you’ll be needing a Pandora Battery to reinstall CFW.
The reason you can’t install 5.00 M33 on your PSP is that it’s a lower version (5.00 is lower than 5.50) and you can’t downgrade a PSP without a pandora battery.
Initially one of my friend had did that. But now i want to do by myself. So, I downloaded 5.50 GEN-D3 and try to reinstall in my PSP. But mistakenly I have installed “Flash Install OFW 5.50″. After that again i tried to run the 5.50 GEN-D3 then the message pop up saying that his game cannot be started. The data is corrupted.
Right now i have got 5.50 Version System Software in my PSP. But I need to reinstall 5.50 GEN-D3. Is this possible without Pandora Battery? Please help me.
Do I need to reinstall the Custom Firmware in my PSP in every format of my memory card??
Well you basically installed the official firmware so the only way to get past that is to downgrade using a Pandora battery. Using a Pandora Battery is the ONLY way to install CFW on a PSP once it exceeds 5.03 OFW
. Also, no, you don’t need to reinstall your cfw when you’re just going to reformat your memory stick.
Now what m i supposed to do? What will be the best solution for me so that again i can play my PSP with memory card. Waiting for your reply. Thank You.
Hi.I’m new to this PSP thing so excuse me for the stupid question coming up. So here it is , can i install 5.00 M33 on my psp 2004 3.90 m33-3 without risking to brick it?
guys I need your help I have a jap fat PSP trying to update with Custom Firmware 5.00 M33 each update i do it give me a loop from 84% too 99% when installing,
what should I do?
Guys I need your help I have a jap fat PSP trying to update with Custom Firmware 5.00 M33 each update i do it give me a loop from 84% to 99% when installing,
I have Pandora Battery plus the Magic Memory Stick so I have FW 3.90v M33-2
Is there a way I can use Pandora Battery plus the Magic Memory Stick to install the Custom Firmware 5.00 M33?
more info……
patulong naman jan oh… nag kamali kasi ako eh… na download ko ung version 6.20 na software,, past sowftware ko is 4.01 m33 . . huhu pls help me .. gus2 kong ma download ung 5.50 d3… pls
Need mo ng pandora battery to downgrade. If wala, pede ka dumaan sa mga shops na nagooffer ng downgrade. Nasa 500 pesos yung downgrade.
tulong nman dian bket corrupted ang cnasabe nung nilagay ko sa psp ??
anong firmware mo ngayon? need mo na may cfw na ung psp mo para iinstall ito.
ver. 3.71 m33-3
Try upgrading to 4.01 M33 before installing the 5.00 M33 update
guys, a little help please..? i’m getting error message everytime i run the 5.00 update under Game. it says:
“This game cannot be started. The data is corrupted.”
i downloaded everything (5.00 M33 & 500.PBP) and followed all those instructions above, but everytime i run the 5.00 updater, i’m getting the same error message..
i got the installers from the links provided above so i’m pretty sure it’s not the files i downloaded.. i’ve done uninstalling and reinstalling everything for about 10x now, but to no avail..
i have a Pandora PSP Slim 2006, current FW is 5.51 (before it was at 4.31 i think). i have no idea what happened.. please guys, i need your help..
You have updated to the official firmware 5.51, you need a Pandora battery to downgrade and install CFW.
Is this too long to unpack? I followed all the instructions above and started the update but it takes too long for it to unpack. what do you think is the problem?
3.90M33 – 5.00 M33
Shouldn’t take more than 5 minutes for the whole process. Looks like something went wrong.
umm, I did end up downloading the official firmware
That’s what I had asked. So does this mean I have to make another magic memory stick and borrow my buddy’s Pandora battery in order to download the custom firmware?
I got confused with the multiple comment postings >_> sry. Yes, you need to do all that again. Question is however, what official firmware are you on? If you’re below 5.50 (that means 5.00 and 5.03 only) then maybe you can try this method out:
http://www.atmaxplorer.com/2009/03/how-to-check-if-your-psp-can-have-cfw-installed/
It doesn’t require a pandora battery
I want to go back to OFW. How would I go about doing this? I am currently on Gen-d.
when I try I get error reading 500.pbp at root. I have tried for different time, each with the eboot file from a different site, (thinking that I got a corrupt version), no luck.
You need a Pandora Battery to downgrade as your PSP won’t allow you to install an update that’s lower in version that your current firmware.
Errrmm…. Why does it say that 500PBP is a incorrect file when i run the thing?
do u have a pandora battery?
Dude If you follow the directions nothing goes wrong. It says incorrect file maybe because you put the cfw and changed it to 500.pbp you have to change the FW to 500.pbp and leave the cfw as eboot.pbp
umm I currently have cfw 3.71 m33-2 and every time I follow these instructions step by step I end up with a corrupt file I cant run… can anyone help?
yo atma currently I have 3.52 M33…when i upgrade it to 5.00 M33 it says tht
“I need to have 3.52 M33-3 or higher”…
>>NEED HELP<<
Ay yo atma, I need some help dude…
I have a PSP Phat with ’3.52 M33′, when i upgrade it to ’5.00 M33′…during the installation, after ‘unpacking’ it says tht I need to have a software ’3.52 M33-3′ or higher…
>>Need Help!!
Hmm that’s odd…. try updating to 4.01 M33 first then jump to 5.00 M33
i have a psp slim 2000 nd i followed the instructions above but whenever i strt the update on my psp it says tht the game could not be started… it currently has 4.71 official sftware
i also owna psp fat nd it has an official 5.51 sftware can it be hacked??
You’re on official firmware. This guide specifically needs CFW. Read this one instead:
http://www.atmaxplorer.com/2009/07/convert-your-psp-to-custom-firmware-without-pandora-battery/
As for your psp phat, you need a Pandora Battery to downgrade that.
Thnxxx Man It Wrkd !!1 Thnxx u
how to disable all plugins?? i don’t get it.
Go to recovery mode and disable plugins there.
hi. i have firmware 3.90 M33-3 on a psp fat can i upgrade to this fw directly???
by doing this will i be able to play metal gear solid peace walker??
thanx in advance
Yes, you can upgrade to this firmware directly. To be able to play Peace Walker though, you need to install the prometheus module for this firmware.
I had cfw 3.71 m33 installed but then I accidently updated to ofw 5.00 instead of cfw 5.00 m33.
Do I still need a Pandora battery to install cfw 5.00 m33?
Nope. You just need to follow this guide:
http://www.atmaxplorer.com/2009/07/convert-your-psp-to-custom-firmware-without-pandora-battery/
i hav a 3.52 m33 but i want to go to 5.00 ofw will this work
Yes, just download the FW update for 5.00 and not the cfw bit. Err why would you want to go OFW?
i have psp phat 1000 i have previously have 3.51 M33, I was able to follow those step and now have 5.0 M33-4. I formatted my mem stick and copied back games and savedata, games are fine but can’t load my savedata, can this be restored?
I have a psp 1003 – software version 3.73..
i follow the instruction to download 5.00 M33 and 5.00 PBP. i copy to memory stick. it show corrupted data in psp. what can i do?
Official firmware?
If you are on the official firmware you need to follow this guide instead:
http://www.atmaxplorer.com/2009/07/convert-your-psp-to-custom-firmware-without-pandora-battery/
Heeey mind doing a tut for changing the theme on PSP? Like the one I’m seeing at the picture. Do you know any site offering themes?
Wat should I do , if i click X then .the game cannot be started.the data is corrupted?
Do you have cfw installed? The installer won’t work on the official firmware.
hey
i have a psp N-1002 and was asking if i could download games from here
I have 3.71 m33-2 on a phat PSP, done with Pandora’s Battery anout 2 or 3 years ago, can I update straight to this?
Yes you can
Thnak you very much
i have 3.80m33-5 on my fat psp.. can i upgrade to it(5.00m33) ??
i’m newbie with psp..
so afraid if my psp got brick… thankz
Yep, you can install this cfw right away.
just had to say THANKS!!!
It worked!!!!
the other guides I looked at had me confused…
you rule!
i have a slim
ofw – 5.03
cfw – 5.00 m33
ChickHenR2 i think?
how do i upgrade to 5.00 m33-6..
tnx..
hi i have psp slim with 3.90m33=3
how can i upgrade it to 5.03 gen=c
plz rply soon
yes but seeing as you have a hackable psp (based on your firmware), consider upgrading to 5.50 GEN-D3
I want to go to 5.00 m33
but it says a higher or same ……. has been applied
then it quits
i am running 5.00 m33-6
please help
You’re already running 5.00 M33-6? You can’t downgrade to 5.00 M33 without a pandora battery. Err why downgrade?
Never Mind
Well the real reason is because i applied this patch so i could use the new psp camera, and i need 5.00 m33 for it to work
hey can anybody help me out? i’m using the fat psp update version 5.50 GEN B and i want to update it to 5.50 GEN D3 but every time i follow the steps in the end it shows in the game folder tht the data is corrupted. plz i need help!
Can you take a screenshot of the directory containing the XGen updater on your PSP?
Hi, currently i got cfw 3.71 m33-4, can i upgrade to 5.00 m33 without upgrading to 4.01 first?
i dont understand what ium supposed to do here:
i downloaded the 500.PBP and then extracted that other thing i was supposed to dl. i copied the small UPDATE folder to psp/game and there was a file inside the update folder called EBOOT.PBP i renamed it to 500.PBP and WHAT THE HELL NOW?!? the other file is 500.PBP too and windows wont let me have two with the same name in one folder! what am i supposed to do?
thanx
WOW IT WORKED!! I FIGURED OUT MY PROBLEM
sir ask ko lang naupgrade po ung PSP 2004 ng pinsan ko into 5.50 using UMD ano po pde gwin para mklagy kmi ng games sa PSP ng pinsan q at anong update ang pde thanks reply ko sylverblade
Can someone help me? I have a phat running 3.52 M33 (bought used). Trying to upgrade following these instructions, did everything as stated, but when I go to run the 5.00 update (the logo to the left does say 5.00 m33), I just get a black screen with no activity…can someone help out?
i am having version 5.00 M33 on my psp 1000 fat
i want to update it to 5.50 gen a
but the given link is broken
any other link?
The link to update to 5.50 GEN-D3
Help…When I try to start the CFW it says that the data is corrupted. What should I do?
What is your current firmware?
Sorry. I found out how to…. Took out the battery and i’m back to 3,52m33. I’ll try sylv3rblade’s advise to others with the same prob.
I should also mention that the firmware is 3,80 m33-5, not the reg firmware.
Re-scratch everything. Now, I’ve been able to download official Firmware 5.00 by creating an update folder and not re-naming the EBOOT file (can u tell i skipped one of the steps, oops). So do I need to your directions on how to convert my psp to coustom firmware, or is the custom firmware already downloaded, it just didnt copy the name correctly?
Well you need the instructions above to upgrade your existing firmware to 5.00 M33. Otherwise you might end up installing the official firmware and end up in a whole lot of trouble
Hi again sylv3rblade, i did what you told me but it says. The game could not be started(80020148) what does that mean? thanks again