R: When setting up for a points game, divide your army into 4 wings. Right, left, center and reserve. The center must be the largest wing, and no wing may be more than double any other wing. This is done by points - not by number of stands. Thus, a legal 4000 point army would be:
Center 1250 points
Right 1000 points
Left 1000 points
Reserve 750 points