Trying to get homebrew running on your PSP? Want to add a screen light to your Game Boy? Trying to figure out how to work your GP2X? By popular demand, discuss it in here! (This forum is for pre-built handhelds, NOT custom made portables!)
Not sure about the PSP version, but daedalus has been a personal favorite of mine since I found and used it for a while, on PC and also on XBOX. Both have seemed to be nicer than any other n64 emulators I've used, as far as compatibility, features, and running quick and smooth.
Current projects:
Ultimate N64 Guide
N64 Portable (x2)
NES Portable