I just purchased a new Slim Silver PSP today and I have a few questions. I have read about the many different things you can do with a PSP, but this is fairly overwhelming. What I am looking to do is be able to play NES, SNES, and PS1 games on my PSP, as well as change my background. I am under the impression that in order to run emulators you need some sort of custom firmware. If anyone can point me in the right direction I'd appreciate it!