yes, my dvd is first boot. I can actually boot into the vista install until it asks me where to install, giving me the choice of the two drives. I clearly need to configure them in a RAID POST, which I am completely unable to find :-O
Progress - OC support has no idea how to fix it, in fact they were 'unaware of any raid issues' (dont they read this board?!), so dont bother calling them. If you do a search on this forum for ab9 raid many people have encountered this problem. It seems to be fixed by flashing the bios. I will proceed with this shortly if I can find no other solution...