http://blogs.technet.com/b/server_core/archive/2009/10/14/upgrading-windows-server-2008-r2-without-media.aspx
http://itme.info/windows-server-2008-r2-upgrade-from-standard-to-enterprise/
http://blogs.technet.com/b/server_core/archive/2009/10/14/upgrading-windows-server-2008-r2-without-media.aspx
http://itme.info/windows-server-2008-r2-upgrade-from-standard-to-enterprise/