I am still getting my smoker completed with a new heat source (propane) when a friend handed my a big problem. He had slow cooked a prime rib to the last two hours and frozen it. He wanted it smoked instead of slow cooked for the last two hours after it thawed out completely. I told him I was just getting started but he insists. I intend to thoroughly preheat my new cement smoker, heat to 220 degrees, stabelize the heat and try smoking this beautiful piece of beef for two hours monitoring with acurate thermometers until it reaches an internal temperatre of 135 degrees. I know I shouln't try this so early but heck, this is Mexico. Any help and suggestions will be gratefully received!!