I just jumped through a bunch of hoops getting this to work on my Suse 9 install, so I hope this applies to you too..
I found another post on this forum that outlined exactly what you need to do to get it to work (sorry, I couldn't find it to provide a link for you). I would recommend backing up your original XF86Config file before trying any of this though to be safe.
As root I had to:
Open XF86Config file with a text editor
Locate the "Device" section
Change the driver= from "nv" to "Nvidia"
It all worked fine for me after that.
The other post also suggested running glxgears from a console to test the driver. I did, and got 5768fps with the new driver.