Firstly you need a graffix card with 2 outputs on it.
Usually there will be 1 DVI out and 1 VGA out so you will need to buy a converter for 1 of them depending on your monitors connection.
Once both monitors are plugged in boot up and windows will recognise the 2nd automatically, all you have to do is enable it as a second desktop in the display properties.You might want to get a desktop app like 'UltraMON', for things like extending your taskbar and snapping to monitors etc

Post edited by owner 30/06/2008 14:16:24