Hello-thank the good lord for this ;D
Now, We all have heard about the new firmware on psp-5.55-6.00 right?
Well they made a patch...that only worked on 5.50GEN-B, seems cool-but what about m33 users?
Well they made it-WE CAN PLAY DISSIDIA ON M33!!!!
(Note-this also works on 5.03GEN, HEN R2, and 5.03MHU-so some psp 3000's can use these tools-trial and error is required)
Now, here is what you need (google these-or use your normal psp news/homebrew site)
-Eboot Patcher v1.0 – Patch games to work with 5.00 M33-6 & 5.03 MHU
-Yoshihiro’s 5.55 & 6.00 games decrypter V2
Or v3-Please read on-you may not need the eboot patcher if you get this-but I have left it just incase-do read on-UMD GEN 4.00
Seems easy enough-You see the patch for us m33 users needs 2 patches-one for gen-the other enables m33 usage.
Now, while the "5.55 & 6.00 games decrypter V2" for Gen-B has instructions-they seem...difficult at first-so I'm re-wording it basically.
Now for the guide (I will clean it up some time-sorry but I lack pics to use so bear with me)
1.Grab the required files and a game to use (back the game up)
2.Open your psp's memory stick and insert "5.55 & 6.00 games decrypter V2" into the game folder (the folder's contents shall assist-after you extract it it's inside the GAME folder-telling you where it needs to go)
3.With that open still (but head to the root/beginning of the stick's memory) open UMD GEN 4.00 (must be 4.00-any other's lack the features required)
4.Go to file>file listing>export -name it "Filelist" EXACTLY.
5.Locate the "eboot.bin" file which is in PSP_GAME>SYSDIR (optional-once done remove the update folder to conserve space)
6.Extract the eboot.bin (it'll still be there-but it'll be copied where ever you set it too)
7.Place the eboot.bin file inside the root (beginning-when you first open the memorystick up) of the psp's memory stick
8.Open "5.55 & 6.00 games decrypter V2" and do as it says...press x to patch :)
9.Now the confusing part...hook the psp up to your computer-check the root of the memory stick-look for a folder called "decrypter" and remove the eboot.bin inside (and delete this once done-and the one on the root still-that's the original-not required if you backed it up like I suggested :) ) and place it on your pc.
10.If your a 5.50GEN-B user ignore this part-this is for us m33 users
If you use v3 you don't need this part-however just incase v3 fails since it was updated so quickly-I shall leave the part in stillUse the program "eboot patcher v1.0" on the eboot-the program will let you know if you did something wrong.
During my first use because I accidently placed it back into the iso prematurly and re-extracted it-the program failed-if it's done it right it'll say that it's been patched-and don't bother making a backup-if you did what i suggested then you can just re-start the process to avoid mistakes.
The eboot.bin is patched for m33 play :)

This is what the menu of the software that enables m33 user's to patch-it's easy-point and go :)
11.In UMD GEN head to the place in the iso where you got the eboot...shove it back in-if the original is still there as it's meant to just give the program the "ok" to replace it-if you deleted it...move on :)
12.Now go to File>file listing>import the "Filelist" you made earlier-say yes on "Do you wish to force file postitions to match filelist postitions".
13.Rebuild the iso-make it a cso/dax if you like, to rebuild (you can remove the system update afterwards-just delete it via right click) go to "save as" and give it a new name-I add "patched" to the end so I know which is which.
14.PLAY!
I have confirmed this to work on an aussie (euro or whatever) copy of dirt 2 which i dumped-unlike my nfs shift it needed this.
Any questions please pm me or ask me-Note that I will update this guide when I can-but I lack tools for pics to place...it is rather easy and the apps have thier own manuals to read-I just re-worded it as I made a mistake trying to understand it-that and to help out :)
Well I bid good luck!
EDIT:While some games work, the patching program fails to work on an euro copy of dissidia-best download the american version-that doesn't require the patch-same with need for speed shift-doesn't need patching (well the euro copy-works for me :) ).
Will attempt to try gran turismo portable on Friday-fingers crossed :)