The Longhorn server part...I think it has something to do with the services removal, though I am not sure. I have tested it some time ago and it messed the installation. However, I will give it a test some time soon, if possible. Also, this one is a little weird, especially when installing from Windows, like I do. I have used the unattended feature, but didn't quite work. I think there is something wrong with it when installing from Windows.