Is it possible to make an exact copy of a follower nif?

[HanzoHasashiX]

The other day I found this post: 

and it showed me how to create a nif similar to a follower's that I wanted to use for a different follower. The reason I wanted to remake the nif in bodyslide as opposed to just swapping out nifs is so i could make clothes for the followers, the only problem is that even though I followed the instructions of the post above, I can't get any physics on the nif i remade in bodyslide. If anyone can tell me what i'm doing wrong, or rather what i need to do to give the remade nif physics it would be much appreciated! (Sorry if I had any bad grammar.)