I myself have been playing around with homebrew's but I do not find them interesting enough to convince me to downgrading my PSP from 2.8 to 1.5. What are the advantages? Besides the fact that I can run homebrew games, what else can a 1.5 psp do? I'd look for it myself, but to be honest, I have to spent 30 min on this site finding simple answers, I'm not advanced with PSP's. My biggest question is, can I run ISO's on a 1.5 PSP? Lets say I have an iso of a game on my PC, can i put it on the memory stick, and run it like that? What if I upgrade from 1.5 -> to one of the higher versions this site has to offer.