I installed Windows Server 2008 in my Virtual PC hosted in my Vista Ultimate. Here is an walkthrough of the installation options and steps. One thing to note is that I did not enter Product Key and thus was taken to the screen of selecting which edition I want to install.
Another change I noticed from the Beta releases (I haven’t tried RC) is that the Administrator account was not given a password and we had to manually set it, but now, after installation, the first thing you are supposed to do is to set your Administrator account password
