dude, here is the low down.
first off, 1964 is THE BEST n64 emu.
secondly, it is THE HARDEST to setup/configure.
make sure you have jabo 1.4 d3d vid plugin, and use azimer's audio plugin. jabo comes from pj 1.4 which is a seperate emulator.
then, you need at least 600 mhz to play games reasonably. my 400 mhz k63 barely does anything except cruisn' world well. and it isn't full speed on that, either.
good luck!