I have a M33 3.51 custom firmware (no M33-X) and I can't upgrade to 3.52 or higher
I have all the stuff, M33 Creator, 150 & 352 .PBP, and EBOOT.PBP
I put it on the x:PSP/GAME/M33CREATOR
I run it
and it doen't work
P.S: I also read a forum with recovery and I put a RECOVERY folder and put 150.PBP as EBOOT.PBP and it comes out as corrupted...