Let me explain better: The Source Code. Assign a head model to it. In this case a Zulu Face model.
You can maybe over ride the Default Face selection (Meaning it wont let the face you have chosen show up on a zulu, you would have different faces for that (The ones you assigned it to the zulu Face model)) If you have a talented coder it could maybe be done. Or else Happy White head on a dark body time