Guide on adding a new model, animation, and creature to HoMMV

Except for files like "GameMechanics\Creature\Creatures\Haven\Peasant.xdb," which are hardcoded.

These paths can also be changed, but you'll have to rewrite them in Creatures.xdb. Or are you talking about something else?

Overall, it's a good idea, but I think an ideal system would be one where the developers have a fully structured approach. That is, the paths to all creature resources are the same and differ only in the root folders.