I plan on reformmating soon and plan to install both XP and Vista. I'm not exactly sure on how to do this, do I have to partition the drive before installing my first OS or can I do it with a partition program after. Any help would be appreciated.
You'd be better off partitioning before you install.
I've never done a clean install of Vista, but XP gives you the option to create as many partitons as you need during the ititial setup.