Does this file contain nothing else?

Are you saying that this is the wrong place? When you extract MMH55-Index.apk, go to MMH55-Index\GameMechanics\Creature\Creatures, and they are set by faction.
If you want anything else, I couldn't understand.

The only thing that competes here is the number 5.5.

I agree. Mods are so different. We can discuss the differences for a couple of pages, but I believe it is worthless because the only people who need to know a part of the architecture of the mods are Nargott and I. So, we can help each other by exchanging tips and tricks.

Players are meant to explore the game and enjoy it. Serovoy, if you have any specific question toward any of the mods, ask it in their specific thread.