hi i originaly had 2 partitions on my 500gig drive xp/vista,i've decided to go full vista and was wanting to join the to partitions,the problem is that the vista disc will not let me join the 2 partitions,so i was going to use my xp disc to join and format the hdd.My question? Is there a way i can totaly wipe and format the hdd without useing the windows disks.