Download this http://download.nvidia.com/XFree86/nforce/1.0-0261/NVIDIA_nforce-1.0-0261.tar.gz
You will need the kernel-source and proper development packages.
After you get all that squared away untar the nvidia download and cd into it and then cd into the nvnet dir and run make && make install (you do this since there is no need for the sound driver as it is identical to i810_audio) After that you should be able to add the proper alias to /etc/modules.conf
(alias eth0 nvnet) then configure the network interface and be on your way!