If they don't have a precompiled driver for the kernel version you are using you will have to do this the traditional way - which often is even easier than using precompiled packages.
Download the "kernel tar file" from the NVidia Linux driver page, unpack it and thoroughly read the instructions. I have used them a couple of times on my NF7-Sr2 (also an nForce2-based board) without any problems. You will have to have a fully functional development environment (gcc and so on) and also the kernel source package that matches your kernel, and I believe this
could be that package.