Place each slab of ribs,meat side down,in center of double thick rectangle of heavy aluminum foil.Sprinkle 2 tbsp. water over rib bones.To form packets,bring 2 opposite sides of foil together over top of ribs.Fold edges over 3 to 4 times,pressing crease in tightly each time.(Allow some air space.)Flatten foil at 1 end,crease to form triangle and fold over several times toward package,pressing tightly to seal.Repeat procedure on other end. Place packets on grid directly over low to medium coals.Place cover on cooker;cook 1 1/2 hours,turning packets every 1/2 hour.Meanwhile, combine ketchup,remaining 1/2 cup water,lemon juice,cinnamon,hot pepper sauce and crushed red pepper in small saucepan.Bring to boil. Reduce heat and cook slowly 10 to 12 minutes.Remove ribs from foil packets.Place on grid over medium coals;broil 30 to 40 minutes, turning and brushing with sauce,occasionally.Serve remaining sauce with ribs.Makes 8 to 10 servings.