Place corned beef in cooking pan and pour in 1 bottle of beer and 1 tsp. hickory smoke flavor. Let beef marinate overnight. The next day, chop up onions and garlic and add to pan. Prepare your barbeque. Use a charcoal barbecue if possible (with mesquite wood chips). Lay pan on grill. Let beef cook for 2 hours with lid on. Throughout the cooking process, pour the remaining bottle of beer on the beef. Serve with boiled cabbage and garlic.