Removing my Windows Vista Partition

[Diagnostics]

So I accidentaly installed Windows 7 on a different partition than where I had Windows Vista.

Is there a certain way I can go about removing the Vista partition? Like using the install disk to format tha HD Vista is on?

Dont wanna screw up my boot, which is why I am asking. Figured there are some techies here that could give some good advice.

I have already tried formatting from the disk management screen and it won't let me... And I had a battle with the black screen of death; but seemed to have won it by lowering my UAC down a level. Every time the UAC kicked in with the dim screen it would send me tothe black screen.

Any help is appreciated.