Windows Server 2008 R2 Migration Utilities x64 Edition (KB977336)
The Windows Server 2008 R2 Migration Utilities package (http://www.microsoft.com/downloads/details.aspx?FamilyID=5c1ec14a-e9d7-46ea-9c6e-73d6bc4219b4&displaylang=en) works with Windows Server Migration Tools to let you migrate Hyper-V virtual machines (either Windows 2008 or Windows 2008 R2) including the associated metadata from one host to another.
Detailed, step-by-step information about how to use the Windows Server 2008 R2 Migration Utilities package to complete these migrations is available at http://technet.microsoft.com/en-us/library/ee849855(WS.10).aspx
Patrick Lownds