I have suggestions, but I'm afraid you might fuck something up.
http://gparted.sourceforge.net/livecd.php
Download this and burn it or stick it on a USB key. When you stick it in your computer, just get to the option where you format your disc. Vista sounds like it has to be nuked before it dies.
Also, keep the disc with the rest of your computer stuffs. It's a handy tool.