Place the ribs in a 3-qt. microwave-safe dish. In a small bowl, combine the orange juice, Liquid Smoke if desired, garlic powder and pepper; pour over ribs. Cover and microwave on high for 15-20 minutes or until meat is tender.
Meanwhile, in a small saucepan, combine the barbecue sauce, preserves and molasses. Bring to a boil. Reduce heat; simmer, uncovered for 2 minutes, stirring occasionally.
Drain ribs. On a greased grill, cook ribs, covered, over medium heat for 8-10 minutes or until browned, basting with sauce and turning occasionally.