It depends on your video setup.  Soft15kHz requires XP.
Also, I didn't see anything about disabling the Aero Theme in 7 in that thread.  It wastes a lot of resources and supposedly causes lag.  It might not start up if you shell directly to your frontend, but just something to watch out for.
EDIT:  Yeah, the way he recommends changing the registry is a great way to shell your cab (can be done in XP too).  If you do this, explorer doesn't even start, so I don't think there will be any Aero Theme.  If you don't do that step, just watch out for it.