This is a Howto about getting 2 (or with small modifications more) monitors working on Ubuntu 7.10 as a single big screen.
Connect one monitor to VGA and one to DVI on your computer. If you see the desktop in mirror mode on both monitors after you connected the second one, then you just have to do some few steps to get it in extended mode.
Don't touch the GUI Setting tool (displayconfig-gtk) for monitors, it won't work correctly and may destroy your xorg.conf
To see the identifier for your monitors you can use: