Do I have to install a Windows 7/RC build on Bootcamp before I can use it with Parallels? Or if I already have it on bootcamp, I have to install it all over again with Parallels? And I was thinking of only having RC as my secondary OS until my Windows 7 disc comes. When that happens, do I just delete all my RC stuff from bootcamp to make room for Windows 7? I'd also lose all my documents and whatnot right since I can't upgrade to Windows 7 from an RC.