Install 4pane in debian squeeze and lenny
Edit /etc/apt/sources.list file
gksudo gedit /etc/apt/sources.list
Add one of the following line
For debian squeeze users
deb http://www.4pane.co.uk/debian/ squeeze contrib
For debian lenny user
deb http://www.4pane.co.uk/debian/ lenny contrib
Save and exit the file
Add GPG key
sudo apt-key adv –fetch-keys http://www.4pane.co.uk/4Pane.asc
Update source list
sudo apt-get update
Install 4pane
sudo apt-get install 4pane