used Phils method
sliced thin, added to casserole dish, stacked them with plenty of room (slices that is) and a hint of water. covered, 325 for an hour or so.
fall apart awesome
On a related note, I reheated a pork loin last night using a very similar method, sliced thin, juice poured over the slices in a covered casserole. Due to the requirements of another dish, warmed @ 400 for 30 mins.