I need to buy a Macbook with Vista installed so I can access certain charts in Vista on the internet from sites that do not support Mac. By installing Parellels I am told I can toggle back and forth. Can I do that while on the internet? Second, when the store sets up the installation of Vista how much HD should they use for Vista Business. I note that Vista seems to say 15GB. Third, When the store starts Macbook they will have to sign on as an Administrator. How do I change all that, User name and password, when I pick it up. Thanks.