I guess the only thing that was confusing me is whether the name for the swordsman model should be "bloodelfswordsman_v1" or "highelfswordsman_v1" because I want to make sure that I'm only replacing the Frozen Throne variant of the model (I want to make sure no Blood Elves cross over into the Reign of Chaos campaign, lol).
Edit: I checked in the World Editor, and I think the right path is highelfswordsman_v1, because when I changed the Swordsman unit to that variant in the object editor, it picked up the expansion version. Just thought I would mention!