It should automatically un-install the drivers after you take out the card.. One question, why did you buy a soundcard if you had onboard already? Beats me, but yes, plug in the card, boot up the computer, and if XP doesnt automatically install the drivers, then you can find them buried somewhere in creative's webpage. If it still doesn't work upon installation of the drivers, then make sure you have the card set to default, as the computer will get confused between the sound card, onboard sound, and front-bezel headphone and mic jacks. Assuming you plugged in those things when you built the computer.