I have found that the simplest way to accomplish this is:
1) If it's hunting linear then make sure your allocated answer interval (AAI) is high enough to accomodate each users AAI. Exp. if there are 4 people in the group and their AAI is set at 15 then I would set my Hunt Group AAI to 60, so that it has time to ring each person before going to VM. Of course, you would need to create a user under groups.