I purchased a throwaway HP ProLiant DL320 G5 server recently from Comprenew, and I started configuring a simple lab environment in order to do some testing with Citrix XenServer and XenDesktop. Because this machine only has 6GB of RAM, and because I wanted a fully-functional Active Directory environment, I decided to build a domain controller using Windows Server 2008 R2 Core to avoid the overhead of the traditional Windows GUI...