Patapon is about the only great PSP exclusive in my opinion. There's nothing wrong with getting old PS releases if you haven't played them though. Final Fantasy Tactics, Disgaea, Tales of Eternia, etc. are all still good.
[quote name='addicted2games']Can someone pm the info on where/how to add custom firmware to my psp. I have a phat and slim psp, does it matter which one I use? Thanks.[/quote]