hey guys i need help here. my younger brother got a psp for christmas and wants me to put some ps1 games on it, it's system software is 5.02 i put resident evil 2 on the psp. the psp picks up the game, but when i go to start the game it says copyright protection information is invalid. would i have to downgrade / pandora's battery it? also it's a PSP-20001pb/98510 series so i don't know if its a slim or not?