Ive been having a bunch of trouble with some 3d collision detection and want to do it the easiest way possible. I want to use the physX sdk, but the problem is, i dont know how to incorporate it with quakes bsp. Any Tips/examples? thanks.

I don't think it can directly be incorporated. PhysX uses its own internal collision geometry formats and stores things in its own spatial partition format. You can't just plug in a BSP file and have it work. You'll have to create PhysX compatible collision geometries for the objects in your Quake BSP world and throw them individually into the PhysX simulation.

-me