you can install many things using apt-get... its a great tool... and i use it alot... for example, if i want firefox, i would type...

Code:
apt-get update
apt-get install mozilla-firefox
and it would not only download it, but install it too... its not that complex... if you havent set up apt-get properly... then

Code:
apt-setup
setup up apt-get....

by the way... to install mozilla that one... extract the file... then open a shell, type in the location dir + install

that should open the installer...