I'm not too sure about freezing foods after you cook them, I know meat will last 4 - 5 days in the fridge after its cooked, and a few months in the freezer before you cook it (as long as its properly sealed.)

As for the carbs in MacDonald's etc., here's a link to a site that has breakdowns for all kinds of fast food restaurants. http://www.olen.com/food/

I'm not sure how accurate this information is, but I recently read that both Wendy's and McD's inject a combination of water/sugar into their chicken patties. The beef is supposed to be 100%, however.

Happy cooking!
Nat