ok i have 2 HDD each 320 GB WD.
on my old 320 GB's C drive there is XP... and on D drive win 7....
now i bought another 320 Gb and connect it, and in disk management(right click on my computer icon and go to manage) i made partitions as per my need....
now i want to install vista on my NEW 320 Gb's last partition that is drive K.
i hope i made my self clear this time.....!!!