Heat grill to 325 degrees C using every other burner. Place ribs on grill between lit burners. Cook on 325 C for 2.5 hours leaving foil packets sealed up and grill lid closed. After 2.5 hours open packets, add BBQ sauce, leave packets open but close grill lid and cook for an additional 30 minutes still at 325. That's it! Seriously they are ready to eat!