There are lotsa different ways to use two different monitors at once. Some companies like nvidia and ATI make dual monitor cards. That way you can preserve precious pci slots if you need to (mine only has three, dang server boards). Another way is to just grab another cruddy video card, throw it on one of your pci slots right next to the existing one, and plug another monitor in. Provided you have Windows XP, it will most generally work automatically. We have three machines here running dual monitors and XP handles all that stuff automatically. Be sure to have your main video on the first slot (slot 0). Many bios' will not understand that you have multi-monitor, so you will not get anything untl XP starts up! Also, if you have on board (motherboard) video, most often you will have to disable it and use two cards instead (this is probably a jumper setting on the mother board).