I understand the hint, and I would gladly help, but I'm busy with my own mod, and I don't have enough time for it anyway.
If you need anything in Max, I can edit the in-game models a bit. But inserting them into the game is up to you.
By the way, are you intentionally keeping all the heroes uniform? For example, the Elves have a hero (I don't remember the name) who would look great with the attack animation of a human knight. The Demons have heroes who would look good on the Nightmare creature, with the animations of a Necromancer, and so on.