How do I add a hero to the map editor?

I just checked how my hero works with a clean copy of the game. My friend downloaded the game, I sent him the .pak file, and he put it in the data folder. In the map editor, the hero is present, and you can select him as a hero in a newly generated map.

The index.bin file stores the paths to all the necessary files, including AdvMapObjectLink, Texture, Model, and so on. I looked at it, thought about it, and it seems that this file cannot be changed manually - although I will try in the future - because of the various symbols whose meaning I do not understand.

Now, the index.bin file is in the .pak file of the new hero, so there is no need to worry.

In any case, through trial and error and reflection, I came to the conclusion that I was able to create the mod correctly, even if it was through strange and winding paths. Next time, I will use the editor's capabilities to simplify my own life.