After searching for a few days, I finally found drivers for my Nvidia 9400 GT that work.
Most people probably have already found this, but in case you haven't, here: http://puppylinux.ca/tpp/NOP/NVIDIA-185 ... .25.16.pet
and the MD5: http://puppylinux.ca/tpp/NOP/NVIDIA-185 ... md5sum.txt
Hope this helps someone else.
Xmod