Modding question, Missing mesh ingame

[maybenexttime]

I used to know how to do this but I forgot one part. In nifskope, when you are copying one branch (mesh) to another mesh (for example using different part from a gun from a different mod to add it to your current gun mod), you first copy the branch. Than paste it in BSFadeNode. I know afterwards you are suppose to delete something but I forget which.

 

It is messing up with my gun stock texture (it should be color black with some details, but it's just a bright red color). What exactly do I delete at the end again after bringing in over a new mesh from a different mod? Thanks!