Take the ham out of the plastic packaging and remove the little plastic piece that covers up the bone on the cut side.
Wrap the whole ham tightly in aluminum foil. Makes sure the whole thing is covered. Place the ham in a pyrex baking dish or roasting pan and set in a 250 degree oven.
Cook for at least eight hours. Turn the oven off and allow the ham to sit in the oven until you are ready for carving. We usually go to church and come back and eat the ham and it's still really warm and tender.