I just bought my PSP version 3.50.. I dowloaded some .iso and .cso games created a folder named ISO in the X:\PSP\GAMES in my memory stick and saved the downloaded games in this folder. When I tried to open the games in my psp it only says 'Corrupted Data'. Is there a way to play those games without downgrading the firmware of my PSP??? Or should I just need to download something to be able to read the game files?? Thanks!!!