Yeah that option exsists in vista and can quite be useful
It also has the option for backwards compatibility so say like if a program is made for xp you can run it on vista (well I think this is the case with it but I havn't tryed it)
k here is the stand alone installer for the wlm 8.5 k should just download it and it should install fine i was talkin with someone on msn and they wanted to get 8.5 but the normal setup didnt go but that one did so here is the link had to upload it