Need help adding a new piece or head gear (custom model)

[Yogensya]

Hey,

 

I think I'm gonna need a bit of help importing a custom visor into Fallout4.

 

So far I've made some weapons and that has worked well for now, but now I'm trying an armor which needs to be skinned to the head bone and all I get is a mangled mesh.

 

This is the mesh I want to import:

 

http://files.gamebanana.com/img/ss/models/57236c2cebdc4.jpg

 

 

 

And this is what I get when I try to put it in-game (notices the jagged edges):

 

 

 

I'm using niftools, 3ds max 2015. Basically what I tried was to import the male head and a visor from the game into max, then set the skiin and BS modifiers the same way on my mesh and export to nif.

 

Does anyone know of a tutorial i can find that explains the proces or do you have any tips on how to resolv this? Thanks in advance.