I am also kinda a noob, but i just installed it (after screwing up once!)
But i finally figgured it out:
Download the driver at http://download.nvidia.com/XFree86/L...-5328-pkg1.run
if you haven't already and save it somewhere you know, like your home dir.
Goto the download location, open up a shell, and type:
The star just simplifies typing the whole darn thing in (in case you are a total noob)
It will guide you through the install.