http://blogs.technet.com/mniehaus/archive/2009/06/30/mdt-2010-new-feature-10-detection-of-signed-drivers.aspxWhen importing drivers into MDT 2010, Deployment Workbench will validate if each driver is signed; this information will be recorded and visible in the list of drivers.  Remember that Windows will always prefer signed drivers over unsigned drivers,en-USCommunityServer 2.1 SP1 (Build: 61025.2)