Thanks whs, following that guide now using VirtualBox.
When it comes time that the Windows 7 Beta will no longer work, how do I uninstall Windows 7? Do I just delete that Virtual Partition?
EDIT: According to your guide, when making a new virtual partition in VB, you told us to choose "Windows XP" from the drop down menu because Windows 7 and Vista aren't there... but for me, it is. I don't know if you were using an older version of VB, but in my drop down menu I have all Windows OSs, for example XP, Vista, and I even have Windows 7 in that list. Should I choose Windows 7?
EDIT #2: Wait. I got my Virtual Partition running, but I want to install directly from my downloaded W7 Beta image. But what I downloaded was an .aspx file (default.aspx). Help?