Well I finally checked this one out (PSP Genesis) and it's pretty damn sweet I must say. Anyone on a 1.5 PSP needs to learn how to use the swap trick before they can get any emulators running. As slayer2psp stated your roms need to be unzipped...in this case (Genesis) that means you will have .SMD files. Also make sure the 'system.fnt' file is in the emulator folder...I left it out at first and couldn't see any words