I didn’t see any references to USMT 5 in parameters.ini. Is USMT 5 currently an option or does it also need to be addressed in a future MTBundleCreator? USMT 5 requires a hotfix to migrate Office 2013 settings. http://support.microsoft.com/kb/2846838
WADK8.1 has USMT 6.3. However, USMT 6.3 cannot backup settings from Windows XP.
Starting from latest WADK, USMT should have been included directly in the WADK installation so during the MDT Bundle creation we should be taking directly from WADK installation folder (without needing a path in the paramters.ini file)