My all-time favorite game on the N64 is Sin & Punishment. I have played the crap out of it.
I haven't tried out the N64 emulator for the PSP for some time... last time I tried it only ran a few games at anything approaching full speed. It crashed on Sin & Punishment
I tried it out last night and the newest version is much improved! The sound is still better left OFF but some of the games like Zelda, Mario 64, & Mario Kart appear to be running at near full speed.
I decided to give Sin & Punishment a go and I'll be damned if it didn't boot up! There's a LOT of glitching and the colours are WAY off but it's playable. The control scheme is weird (the N64 game uses an unusual control layout) but overall I am very pleased. I can't wait for the next revision! Maybe it will play Stunt Racer 64... the BEST racer on the N64, bar none.