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

I didn't notice, sorry, what specific possibilities I was talking about. If you're referring to the phrase "new 10 races," I meant the fifth game, where you can't add new races; it's just my specific sense of humor, because the attitude of "I have a feature/mod/cool thing, but I won't give it to you because you didn't ask me about it on the entire forum" makes me smile, excuse my expression. Of course, in other games, they will add and have added.