Hello. I'm currently using an old phat psp model 1000 with 6.60 PRO B-9 as the CFW and my problem seems pretty strange. I have an ISO folder set out on my computer for my psp after initially installing the CFW. When I finish transferring these games onto the PSP, the half of the folder are completely fine and play fine. The later titles however do not work and are seen as 'corrupted' data. This applies both to PSP and PSX games. I have gone through my own testing and can verify that individually the games all have the potential to work on my PSP. Additionally, there is no break of connection from the PSP to the computer during the transfer. I've had to painstakingly reformat my PSP several times, reinstalling the same programs and emulators to ensure that this error was more than just a one off occurrence and it seems to produce the same results. This does not happen to my video or my music files that I have stored on the memory stick so y question is really, what can I do to fix this?