It would be great for pack makers to be able to change the trades of these mobs. NetherEx has a good system implemented. Sorry if this is already implemented and I didn't realize!

Vtt might actually work now; neeed to test.

well so dose vtt

using vtt I've been able to change the trades of all 3 lost miner professions. However, I can't seem to affect the traveling merchant trades at all.

The traveling merchant trades are set up in a different way. I might change this so using vtt is possible.