Thaw the turkey and place in a roasting pan. Put 2 sticks of butter in the cavity of the turkey. Take 1/2 stick of butter and rub on the turkey itself. Pour 1/4 can of beer in the bottom of the roasting pan. Place desired amount of seasonings in the beer can (we love tons of flavor, so we use about 1 tablespoons each of garlic salt, cajun seasoning and greek seasoning and 1 teaspoons of onion salt. Place can into the cavity of turkey, top first. Leave the can sticking out of the cavity a couple of inches. Pat seasonings on the buttered turkey. Cover with aluminum foil. Cook as directed on bird.