oh you mean the SETUP of win xp?

you have to hit like F2 or F6 right when the setup blue screen (heh, how ironc) comes up and put in the flooppy disk for the drivers for the SATA. XP doesn't nativly know any SATA I think.

If the "XP" drivers don't work... try the 2000. That's what I did... worked fine.