Ok I haven't test, the texture IDs in Kimera 0.97a. But if everything works as I think it does, you need to disconnect the textures from the model first.
It's easy to do, you only have to kill groups you don't need, so you have in the end only one group per head part. Save every part (do not use apply) as 'TheNameOfTheHeadX.p' (example:DFHD1.p). The parts you need:
Head (create this at last and save it as the default head.p file without a number)
Left eye (from the view of the model)
Right eye
Mouth
Now open the model, you should see it without any textures. As next add the isolated parts in this order to the head: Left eye, Right eye, Mouth.
Change the texture ID for the parts:
Left eye- ID:0
Right eye - ID:1
Mouth - ID: 2
Save everything in a new folder and click on yes when it's asking you, "Compile multi-P bones in a single file?". You may need to organize the loaded texture order in 'Show Texture option'. You can move a texture with the arrows.