how to use controller on pc games?

http://support.microsoft.com/kb/908888?sd=xbox

thats the microsoft page for it, thats assuming you are using the wired one, if its wireless then they have a dongle for it, its usualy like 20 bucks but hey youll have wireless controller for pc.. sweet

ps. a good utility to map buttons is pinnacle... but there might be freeware ones too.