No, you don't have to delete the toher plugins, they're different files after all. Resident Evil is seriously bugged in many N64 emulators. You'd be better off getting the PSX version and playing that. If you still want to give the N64 version a crap, get Glide64 + a wrapper, Azimer's Audio plugin (WIP2 perhaps). Also, try 1064 over Project64, or wait until Project64 1.7 is released.