During the install you will see Custom for install instructions. Click on the Advance part of it. should look like this after that:
Blasted Ben. I forgot he had that stupid thing on for hotlinking images. I will get him later for that.
Then jsut click format and then isntall. Gets rid of the Windows old isntall while doing a fresh install. If you want XP then follow these instructions:
Windows XP Install - TechModo