Well maybe it's just a coincidence, that a set of perfectly working brakes , and perfectly working power steering BOTH went out at the same time, which was also the same time I replaced the wheel. From the sound of it, the brake system and steering are linked together. "These cars are a hydroboost brake system which depends on the power steering pump for pressure."
I did this wheel swap on my 94 mustang once, and had no problem at all, but I did have an extremely hard time getting the stock wheel off of this 04. It could be just a coincidence, but it's a piss poor one. And I can't think of any other reason these systems would go out, except the the wheel swap (even though that makes no sence). Well if anyone else has had this problem, please share. Maybe this will stop someone in the future from having a problem.