how to prevent npc attacks

[Kayen]

Kayen: Implemented Perl MOB Quest Object SetDisableMelee(1=Disabled) - Prevents the ability to auto attack.
Kayen: Implemented Perl MOB Quest Object IsMeleeDisabled()

So you would use
$npc->SetDisableMelee(1);

NPC will do all its regular functions but it won't be able to auto attack

Kayen