Video of an unattended vCenter 4.0 install on Windows Server 2008 x64, using Windows Authentication to a remote SQL Server.
Detailed overview of the XML configuration files
Basic overview and demo of the statelesx virtual appliance from vinternals.com
In this video, we install VirtualCenter 2.5 in a domain environment, using a separate host running SQL Server 2005 + SP2 for the VC database