Yesterday I received my MBP (15 inch 2.4 GhZ 160 Gb glossy). I purchased Parallels about a week ago (before 3.0 released). I installed it and was prompted to automatically upgrade to 3.0 which I did. I am trying to install Windows and have had some problems. I own an 2002 XP disc SP1 and a 2003 XP professional disc SP2 which may be an upgrade disc (neither is needed anymore on my Dell laptop that has been using it before I loaded Vista on it). I could not load either onto Parallels. I am willing to buy a new Windows version. Which will be better? Obviously Vista is newer but may take up more space. My primary use will be to access a work VPN. If I do buy Vista, which version is needed to run a VPN. At Circuit City they said I will need the Business or Ultimate version. Is this true? Did they really not include this capability in the Home or Home premium versions? Finally, which versions(s) have been working on Paralells 3.0 (or earlier). Thanks so much in advance for advice on which software to use/buy and on any tips on installation.