It doesn't really. That is dependant on not needed to authenticate and not for individual copies from what I see. Hence, useless.
It also depends on only having one computer as master.
It also, is as it seems, basically making a ghost, but in this case a two computer ghosting process. You still need an installation to do it as well, so once infected it's still useless.
If you took precautions prior, and kept it up and somehow kept the stuff from spreading over the network, and had the right version, it is plausible.
but it still would rely on a version that probably didn't need authentication from what it looks like.
Otherwise, it seems you're up a creek with Vista.