The nvidia drivers are great, but just wait until you have Fedora Core 2
then try to install them. (Starting X will lock your machine up, so that you have to press the reset switch).
If the drivers were open source, lots of people could work and soon fix this problem. In fact, they would probably be part of Fedora Core so you wouldn't have to install them separately at all.
Hmm..I can use Nvidia drivers on a RH9 box with a 2.6 box.
As things are, who knows when nvidia will release updated drivers that work with FC2.