We have done the dinner package at MM a couple times and havent had any restrictions.
We were told we would get the mixed field greens salad(which we didnt like the first time) and were able to substitute the Caeser. Thats served family style. You are then given 1 flat bread for every 4 people in your party, your choice of any kind on the regular menu. Everyone got their choice of 1 entree off the regular menu, and then a choice of dessert. Once we were given a choice of cheesecake or tiramisu, and once we could have anything(I guess there was that 1 restriction one time).
I dont know if things have chagned but we did it this way in 7/04 and 8/03. We have also done the dinner package at MM in 00, 01, and 02, but that was before they changed it to a fix price.