NPC Wander

Would someone please make a tool or something that would make the schedule SCHED_IDLE_WANDER run on a target NPC? Or direct me to something that can?

My goal is to make a group of NPCs wander randomly so they’re in different places for a series of shots and in mid-stride. Thus far I haven’t found anything that can do that for me, so I’m really hoping someone can help me with this schedule.