This is an easy step. (all side views)
Translate the head install bone on the Y and Z axis to the base of the head.
Scale head install bone to the top of the head.
Translate the neck install bone on the Y and Z axis to the base of the neck.
Translate the chest install bone on the Y and Z axis to the base of the chest.
Translate the mid section install bone on the Y and Z axis to the start of the waist.