this is a very cool model that I made a while ago, and its now in Age of Mythology. This is just a model, and it is intended for use in the Editor. It will be a version of barrel in the editor (right click to change) do not use this model online, it will not work.
put the brg file into your AoM/models
put the ddt file into your AoM/textures
put the anim.txt into your AoM/anim