You know, I had a thought.
Aren't most NM the same .dat file as their normal counterparts? Like Jagedy-Eared-Jack for instance. Normal rabbit.
I don't see a file in ModelViewer thats specifically JEJ - just rabbits.
So...modifying the rabbit file would just change all them stinky wabbits, not just JEJ.
The name-changing crap is Hex editing or some crap like that, not .dat changing...exactly.