Ok, so I'm about to get a psp. I can get a new one or one that already has 1.5 firmware. I assume 1.5 firmware would be best. Now, the main thing I want to do is play .isos on the psp. So if I get the one with 1.5 firmware, what do I have to do, just upgrade to a custom firmware? I have modded xboxes, ps2s, and ds lites before, but what are my chances of bricking the psp? Any help is greatly appreciated.