i am currently typing with my tv as my computer monitor, thanks a bunch guys~!
I can't tell you where it is off the top of my head in Vista, but in XP it's in Display Properties, then the Settings tab, then the Advanced button. Somewhere in there you'll probably find a card-specific tab for enabling those optional connections, setting whether it's a copy of the internal or an extended desktop, stuff like that.
The card driver may provide a System Tray utility, or a utility that runs as an application in the Programs menu off the Start Button.