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

My model isn't significantly altered, and the skeleton fits. I just need to choose the correct skinning parameters to avoid it being too rigid or too elastic. In the first case, the animations cause the polygons to protrude stiffly, and in the second, the hero turns into some amorphous entity. I need to find a balance, which is what I'm working on right now.