This is a question of curiosity and I am not asking for you to give up any illegal information. Is it possible ,and or legal to put nintendo games (ie: mario cart, pokemon, etc.) on my psp?
Actually, it's not even legal then. Even if you make a super nintendo emulator yourself and rip all of your own games, it's still illegal.
But...
Most game companies that made games for the SNES, Gameboy, et cetera... that are still around don't care. They aren't going to make any more money off of a fifteen year old game, so I put it in the category with other outdated laws such as the "carry your gun to church" law they have in South Carolina. Nobody follows it, and nobody cares.
Now, pat92phil, here's a list of some good emulators you might like. To put the emulators on your memory stick, put both folders (the "EmulatorName" and "EmulatorName%") inside of GAME150 folder. Put the roms in the folder that doesn't have the percent sign (%).