Thank you so much for such help, Met@ ^^
I've been trying for a long time but I still can not, but the progress is important:
I have exported the human model of World of Warcraft and converted it to .m2i to import it into Blender. Then I have converted the .m3 from Johanna to .fbx to import it too, I had to rotate it 180º, and changed the scale because it appeared giant.
Then I have linked the four meshes I have of Johanna with the armature of the human, and renamed them (Mesh0000.005 - Mesh0000.008), but not deleted the model of the human for testing:
But when you try it inside the game it looks like this:
Again, thank you very much for all the help lent, greetings ^^