I followed these steps to install Google Chrome (Chromium) on Ubuntu without using the terminal command window:
(This is also an example of finding and installing any software if you know the path for the package repositories)
deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/chromium-daily/ppa/ubuntu karmic main