Possible Duplicate:
What is the best multiple monitors app for Windows 7?
Set one background to stretch across multi-monitor display?
I used to use a desktop utility program that provides one background image for dual monitors. I can't remember the name of it.
You were able to use the hotkeys to move windows around, stretch one image to display across two monitors, etc.
I think it is called "desktop tools" or similar. Does anybody know a tool like this?