If you want him to do it just once during a conversion or something you would use doanim.
Code:
quest::doanim(anim_num)
If you want him to sit permanently or lay down permanently you would use setanim.
Code:
quest::setanim(npc_type,animnum)
If you hadn't found this page yet, it has a list of all the quest commands.
http://www.eqemulator.net/wiki/wikka...=QuestTutorial