The modification is far from working, that is due the male hair over clipping with the helmets and other clothing because of it not being adapted for it. The female face textures are also lacking, with my method you will only find the face you seen in the pic with slight skin color variations.
Get this, https://www.nexusmods.com/mbwarband/mods/6156
Skip to instructions when it tells you how to install on modules other than native etc.
Do what it says.
Now, I have received help of this part. It was so obvious that I missed it ;3
Download the morphis (Butchered it) editor and go through all the troops and change their skins to either male/or female. It will have skin0, skin 1 etc. Napoleon for example, has unique skin. That's what I did at least, playing it safe. Then it should work.
It is far from perfect, as it limits your options to females and some to males, but hey what's to stop ye!!
Polka