Mod requests (orders).

Hello! I'm trying to figure it out myself, but I don't understand much yet, and I'd be glad if you could help. I downloaded maps from the forum and, apparently, reinstalled a mod for modified dendroids, like from Heroes 3. I really liked it. But I had an idea to change the model of any of the standard heroes (rangers), for example, Winrael, to an Ent. I don't know if it's possible, but I've seen mods where dungeon lords were heroes, archangels, and others.