Mix barbecue sauce, marmalade and pepper sauce until blended.
Place half the ribs in single layer in center of large sheet of heavy-duty foil. Bring up long sides of foil. Double fold both short ends of foil to seal, leaving top open.
Add 1/4 cup water (or 1 ice cube) to foil packet through opening at top. Double fold top to seal packet, leaving room for heat circulation inside. Repeat with remaining ribs.
Grill 45 min. to 1 hour or until ribs are done.
Remove ribs from foil packets; return ribs to grill.
Brush ribs with barbecue sauce mixture. Grill 15 min., turning and brushing occasionally with remaining sauce.
