I have this new system with dual p3 1000 and I can't find any software that uses dual processors except for premiere...(and max payne runs like a dream at 1920x1280 lol)

There are a few actually. Programs like photoshop and Maya are. As well as some games. Quake 3 being one of them. Mostly graphic programs though. So it's not really worth it unless you are doing graphics. or a lot of multi tasking. I to have a dual p3 xeon machine. It is very sweet. But if you are just doing daily computer stuff it aint worth it.