if you are in doubt you should just use a mod manager its just an esp file. drag and drop into "data" folder and check the file in loadorder then you are good to go if you want to change the apperance of the armor like lets say. a retexture then you would change the standard Ebony Mail texture. since this reuses the files from game no new additional models or textures. all this is. is just a copy of the ebony mail data and removed the deadric artifact part from it.