Ok, that should easily get you a couple displays.. Fist, install teh latest display drivers from the AMD site. (version 9.6 for vista or seven)
In vista you can easily set up the monitors in the catalyst control center but that is broken (at least it was) in seven (check first). So you need to go into control panel and open display settings. Somewhere in there is a simple tool for multi monitors. I'll hop on seven in a bit and give exact instructions.