Ok, let's break this down:
The best idea is a clean windows XP install. Then disable all the eye candy and extra junk. Get the very latest forceware drivers for your geforce. Then download the latest 1964, and pj64, and extract them to seperate directories. Copy jabo 1.5.1 into the 1964 plugin directory. Also copy Rice's new 5.4.2 plugin. Set the settings in 1964 to select the Rice plugin as the default plugin. Try all the games with default settings. If one or all don't work, try the jabo plugin. If one or all don't work, try messing with the settings for Rice's 5.4.2 plugin.
None of the emus work THAT great "out of box", however that is one strength of PJ64, it requires very little in the way of configuration. Properly configured, however, 1964 OWNS it. Good luck!