Video codecs for what? You migth want to download them at the mplayer site and extract them to your codec folder after which in some cases you have to recompile your video player.
Nvidia driver has a lot of info in it not? Download it from the nvidia site. Go to commandline or terminal and run it with
Code:
chmod +x nvidiainstallerfile
./nvidiainstallerfile
You have to be root. chmod +x makes a file executable.
Help
