Your wireless card should have the Ralink chipset in it. there are basically two ways to do this. Either using the Ralink drivers to get the card up, or ndiswrapper, which uses your Windows XP drivers to recognize the card, usually the ones found on your driver CD that came with the card.
For an idea on the subject, see my article on FC 4 test 3 (somewhat dated, but you get the idea) located
here.
The general article for Linux is located
here.
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"I love it when a plan comes together." - Hannibal Smith