For this tutorial, we'll be editing NPC John. We will replace one of his NPC hats with his classic one. 

Keep in mind that swapping is not all you can do with clothing parts. By using this tactic you can also add or even delete them from an outfit. 

This will also work with hair and body parts.

Remember to save your edited YMT to lml/stream. Delete Everything after "_ymt_dehashed.xml" and just give the file a .ymt extension.

Good luck!