Prepare spareribs by cutting into 8 sections. (8 servings).
Wrap the spareribs in a double layer of aluminum foil.
In preheated oven, bake for 1½ hours.
Remove the aluminum foil from the spareribs, and discard the grease.
In a large roasting pan, arrange the spareribs in a single layer.
In a mixing bowl, add brown sugar, chile sauce, soy sauce, Worcestershire sauce, ketchup, rum, crushed garlic, dry mustard, and ground black pepper. Stir to combine well.
Coat the spareribs well with the mixture, and let marinate in the refrigerator overnight, or for 1 hour at room temperature.
Prepare grill by moving the grate to approximately 4 inches over the source of heat.
Preheat the grill to medium heat.
Prepare the grill by brushing the grate with oil.
Arrange spareribs on the prepared grill, and grill for 30 minutes. Baste with the prepared marinade several times during cooking.