Mix remaining ingredients using both the rice and the seasoning packets and adding 2 cans of water with the tomatoes, and place in a deep casserole dish large enough for meat to lay on top. Place meat on top of rice mixture in a single layer. Cover with additional barbecue sauce and bake one hour uncovered. Before removing from the oven, check to see if the rice is done. It should not be crunchy. If it is, let it cook longer adding more water if needed. Do not let this dish dry out,it should be thick but moist.