NVIDIA driver page
then as root,open a terminal window
cd /wherever/you/saved/it to <----enter the full path, ie cd /root/Downloads
init 3 <----kills the x-server,driver must be installed with no gui running
sh NVIDIA-Linux-x86-1.0-7174-pkg1.run -q <----starts the installer and removes older drivers if present
after the install completes enter:
sax2 -m 0=nvidia <----loads nvidia as module 0(zero) and starts the sax screen config.there is no need to enable 3-d;it's done by default,but may not show.
init 5 <----re-starts x.you should see the nvidia splash screen if everything is correct.