So last night I put my custom Draugr npc in a bunch of the animal lvl lists (like the forest,plains,ambient ones etc) and it all worked fine. However I just found out that doing so will make my mod incompatible with others who alter those same files.

So my question is, can I duplicate those lists and then in the duplicated ones, add in my new npc? Or do I HAVE to create new lists and encounter zones for my npc enemy?