Well, when in fedora wanting to install your nvidia drivers downloaded I presume from the nvidia website it's quite simple, and the nvidia page does describe this. Anyways here's howto:
When in the GUI .. press CTRL+ALT+F1 to go to the shell.
Then type: /etc/init.d/gdm stop (or xdm,kdm, depending on your GUI, KDM=KDE GDM=GNOME XDM=DEFAULT MANAGER!).
I presume it's GDM, since fedora is installing this by default AFAIK.
Then go to the directy where the nvidia driver is:
type: chmod +x NVIDIA-Linux-x86-x.x.x.run
OR : sh NVIDIA-Linux-x86.x.x.x.run
BE SURE TO HAVE YOUR KERNEL SOURCES INSTALLED!!!!
Now type: /etc/init.d/gdm start (this will start the gui again!)
Next up: Playing dvd's.. Download the libdvdcss package, install it.
It's a .rpm file, so just double click and go