Many people on the forum have been having problems getting the NForce audio modules to load under kernels 2.6.16 and later. According to Nvidia, the reason is that the 2.6.16 kernels support the NForce audio devices with ALSA, although your kernel may not have ALSA support or chipset support built-in. To enable NForce sound in the kernel, load menuconfig and add the following options:
Device Drivers --->
<*> Sound card support
Advanced Linux Sound Architecture ---->
<*> Advanced Linux Sound Architecture
PCI Devices --->
<*>Intel/SiS/nVidia/AMD/ALi AC97 Controller
Recompile, and you should have ALSA sound support.
Please post if you have any problems with your audio.
Owner, BW Services