I have do this with some part of different models (the head, the butt, soon the shoes).
The only problem for this time is: The face pose dont work and i try again and again but he dont want work :’(
Here she is:
She is not finish (because is a wip ^^ )
Now i try to replace the red shoes with bare feet:
I still have to reskin this part we do not see the seams, then test it again in the games and then release if all work good.