To make these GForce 6100 integrated motherboards work you must use Kernel 2.6.11, realtek-linux-audiopack-3.5-6.tar.bz2 audio drivers, NFORCE-Linux-x86-1.0-0310-pkg1.run network drivers, and NVIDIA-LINUX-x126.96.36.19978.pkg1.run video drivers.
If you upgrade the kernel to 2.6.15 then audio will not work. The 2.6.15 kernel has networking drivers already built into the kernel and no external drivers are needed. I think that's what is breaking the whole thing. Maybe someone could elaborate.
I've now managed to make this work with 2 differnet Biostar boards and 2 differnet MSI boards without a problem.
Hope this helps someone,