Good day!
Regarding the mod for Sanctuary, I was thinking... maybe simply copying files would help? For example, taking the files responsible for the graphical elements from a submod for MMH5.5, and the actual "content" from the original?
In that case, I have a question: in which folders are these files located? (Including both the graphical files themselves and the text files where the paths, etc., are specified)
If we're talking about the city, its "root" is the city file from MapObject. It contains paths to the fortress walls and the internal structure of the city in the Arena folder, to the buildings located in GameMechanics, to the arrows on the towers and their projectiles, as well as to the models for the map, which are probably also in the MapObject.
The unit's "root" is its characteristics, which are located in \GameMechanics\Creature\Creatures. The characteristics contain links to MapObject and CharacterVisual. As far as I understand, everything is done using a file-based system, so the CharacterVisual folder will contain everything needed for the unit, including icons and text files.
The problem is with the bin folder - it contains all the models, skeletons, and animations. It's a pain to work with them, so try not to touch this folder at all. If everything is done correctly, nothing will break.
I'm still planning to help.... but yes, I'm a bit busy.