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.