OK, here's a step-by-step way to install it:
1. Open a terminal and type:
(This keeps you from having to reinstall the driver after a kernel update)
sudo apt-get install dkms
2. Hit CTRL-ALT-F1 and log in as you normally would
Note: if you get a "no service named ldm found," try using lightdm, kdm, or gdm instead. You're looking for a "service ldm stopped, waiting" response.
sudo service ldm stop
4. Now cd to the folder where your nVidia .run file is and type
[code]sudo sh NIVIDIA*.run[code]
And it SHOULD install. Afterwards, type:
You can then press CTRL-ALT-F7 to get back to the desktop. I would reboot (one of the few times you need to reboot using Ubuntu). Then go to NVIDIA Settings and set your desired resolution, etc.
sudo service ldm start
Good luck! And please post here if it worked, or if it didn't.
And welcome to Ubuntu!