NexusAccountESP

I want to replace a vanilla armor with an HDT one (from a mod) in the Creation Kit and make NPC wear that HDT armor instead of the vanilla one. With HDT plugin installed, ¿I just need to copy meshes and textures to Data and select the modded .nif files in the Creation Kit, and the physics will work just with that?¿I need to do something else?. The HDT armor has .xml file, dont know what to do with that. Please be patient with me, im lerning.