http://blogs.technet.com/svengruenitz/archive/2008/07/04/wds-for-cross-platform-32-bit-winpe-to-install-a-64-bit-os-deployments.aspxHaving a WDS server running already? How about using it to deploy 64 bit versions of Windows Vista and Server 2008 as well? The 64 bit versions of Windows Vista SP1 and Server 2008 can be deployed using a 32 bit WinPE. This means that you only need toen-USCommunityServer 2.1 SP1 (Build: 61025.2)