Ogre body part IDs should be standardised

<img width="493" height="81" alt="Image" src="https://github.com/user-attachments/assets/5bcfd38f-bd62-4b98-85f9-94433dc08a5c" />
<img width="495" height="63" alt="Image" src="https://github.com/user-attachments/assets/04528535-4254-4b20-a900-35d6f63ae0d6" />

Different ID schemes for heads vs hairs. Should be the same format?