@Marcus: I would suggest cloning-imaging your f6'd clean install on a raid array.won't take more than 30mins.Thats how i did it.
steps:
1.get a cloning-imaging proggie. i use acronis true image workstation with universal restore.(very-very-very useful!)
2.do a clean f6 raid etc instal on a single disk complete w/ mb and graphics drivers.
3.install acronis or similar prog.
4.make a bootable cd with acronis.
5.image your install drive on a usb disk or other media network drive etc.
6.remove single installation disk, or include it in an array, or just slip in the raid disks.
7.enable raid in bios, configure your array,reboot to verify it and boot with the cd you created in step4.
8.restore the image you created in step5, on the raid set.
9.overclock the hell out of the mobo, and if you get a corrupt raid system disk, no worries, repeat step8 and you're playing again in 10mins.
voila!
EDIT:Never-ever leave two system disks(single and raid set) boot together in windows! doing so will screw up the registry.
@danroyle: This happened cause vista has integrated sata-raid-scsi drivers in it, not needing the f6 xp crap.I guess putting xp over vista did your trick.