I have a NForce2 chipset on my motherboard, I use the drivers from
www.kernel.org
I use snd_intel8x0 module from alsa instead of the nvidia nvsound module.
I think you make a confusion between the drivers provided by nvidia site (nforce driver)
because it is just 2 modules : nvnet and nvsound for onboard net card and onboard net sound
The drivers for NForce 2 chipset are in the kernel tree