depending on which cooker i'm using as to how i do it,in big mamma jamma i foil and lay em on the grate,on the chargriller i put em in the racks cause i'm usuallt doing at least 3 racks so i need the room.
Whichever way you do them, keep in mind that 3-2-1 isn't an exact science and not for everyone. The only time I tried the full time, the ribs fell apart. Good eats, but not what I was after. I like mine soft but not too soft. You may want to experiment with the times. Also remember, we like Qview!