I have just installed XP on a SATA drive on a K8V-MX.
Make sure that the Onboard Devices Configuration, Onboard SATA-IDE is set to
SATA and not Raid in the BIOS
I then booted from the XP CD and didnot need to press F6 or load drivers
Good luck ¡¡
Motherboard drivers for K8V-Mx: