su as root, then type links
http://nvidia.com.
Some sites can be hard to navigate, but nVidia has taken this into consideration.
You use the up and down arrows to navigate from one link to another, right arrows follows the link, left arrow goes back.
Navigate to "Download Driver" and press the right arrow button. Then use the down arrow to "Linux, FreeBSD, and Solaris Driver", press the right arrow button.
Then use the down arrow to get to Linux IA32 (if 32 bit) or Linux IA64 (if 64).
The driver is a link under each header, version is 1.0-7676, use the right arrow to follow that link.
Use the down arrow to navigate to "NVIDIA-Linux-x86-1.0-7676-pkg1.run" and follow that link.
When you follow that link, a grey box should open up with an option to Save, Open, Cancel. Default is Save, press enter. Then press enter again to download the .run file.
Once the download is done, press "q" and select yes to close links.
Then you should see the .run file, "chmod +x foo.run" (foo being the name of the file).
Then ./foo.run (to execute it), you'll accept the agreement, it may something about building a driver, choose yes.
When it's all said and done, no error, then edit /etc/X11/xorg.conf and change the driver to "nvidia".
Check the documentation in /usr/share/doc (IIRC) for further info.
GL,
-Jason