DFSUtil: New Version?

Does anyone know if there is a new version of DFSUtil out? The version
from my 2003 SP1 Tools is 4.2. The online documentation references
new_dfs_root_name as a parameter of the AddFtRoot command but trying to use
this results in an error - Unrecognized option "AddFtRoot:Backup".
The documentation doesn't mention a version difference. Maybe this was
just wishful thinking on the part of the developer or doc writer! :) But it
would be a very nice thing to have for DFS with multiple roots.