You need the mod Skin selector for mod loader.
https://www.mixmods.com.br/2015/09/skin-selector-v2-1-ml-e-v2-1-c/


Modloader.
https://www.mixmods.com.br/2015/01/SA-Modloader.html



-Credits
-Model by: Cygames/BANDAI NAMCO
-Port/Rig by: Alan74





Enjoy it.