QUOTE
how the hell do you do this?
Well, you need a round grill. You place the turkey on a broiler pan and season as you like. I rub on sage, salt, pepper and stick a stick of butter under the skin above the breasts. This all gets wrapped up nice in aluminum foil with some vent holes at the top. The grill is prepared as usual and after all the coals are glowing hot, I add more coals and then bury them all with ashes (packing the fire as we call it). This brings the direct temp down so it won't burn, but keeps it hot enough to cook and to continue to produce the smoke for the extra flavor.
Put your turkey on the grill and close it up. Monitor the temp so that you know that it is above 160°C. This way takes about one hour per pound. Turkey's sold here usually take 6-8 hours.
A variant to this is to grill it for the smoke for around 2-4 hours and then finish it off in the oven for half the remaining time, but at higher temp.
A replay of IPJ's pic post last year.