Thanks, but I am not sure I am being understood correctly. I do not want to install RC7 on the RAID array. I want to install it to the separate hard drive. When I attempt to do this through Windows, I get an error as per my first post. If I try it through the boot process, there are no devices recognised. I am worried that if I go ahead at that stage and install the drivers, that I will not get the choice of where to install and therefore lose my Vista install by RC7 installing on the RAID array.