With Windows Server 2008 R2 you now have server that is only available for 64-bit hardware.  The question becomes is how do I migrate my server roles like Active Directory or DHCP?  Well in this screencast you will how to install the core server migration tools.  After the core set of tools are installed you then can run PowerShell cmdlets to migrate the different server workloads.

Get Microsoft Silverlight

 

Resources: