Thanks, guys. I guess that answers my question. If there are tires specially made for the rear and special different-sized tires for the front, I couldn't see bringing the rear ones to the front and the front ones to the rear. That didn't make a whole lot of sense.
I guess in a way I'm glad I didn't get the sport package. I see all the tire packages have run-flats, which I think still cost around $400 a tire. Not only that, but I think the sport tires are only good for around 10,000 miles, maybe a little more. I guess for some people that isn't a problem at all, but for me, I personally couldn't afford that until the whole thing is completely paid off
. Thanks again guys!