Here’s a tutorial on how to modify the origin of the model, but I think it uses two programs 
http://discourse.stonehearth.net/t/the-sword-of-my-mod-dont-stay-right-in-the-hand/15465/10?u=relyss
I’m not sure how would you have to do it for beards. Have you imported one from Stonehearth and tried to modify on top of it?