All-in-One
1. Auburn hair
2. Dark blue eyes
3. Game face texture
4. Face model, no LODs

1. hair only

1. hair only

2. eyes only, darker

2. eyes only, light blue

3.

3. blue eyeliner and peach lips

3.

4. mesh only

4. head mesh with lods.
I didn't resclupt them accordingly to lod0 though. Use if you don't want to mess with your LOD settings.