Yeah, I trired extracting it too my desktop then drag it in my PSP/GAME folder, so I don't know, try a different way like Monkeymaximus said, try extracting it DIRECTLY to your PSP/GAME folder.
¿when i did extract it directly it wouldnt uncompress so it would show up corrupted on the psp?
Know of any other good fun homebrew games. [give links please.]