Actually, strike that.
Right click "my computer" and select manage. On the left, select disk management. There should be a setup wizard that pops up. Just cross it off and scroll down to your HDD in the bottom part of the management window. Right click in the white area with the HDD details in (There's usually a blue bar at the top of the white area) and create partition. Create a partition the whole size of the HDD if you want to partition it that way, then assign a drive letter and format the drive.
Sorry I can't explain it better, but that should work. Luckily I got a new HDD today so had to solve the problem myself :)
Mike