yes, i also saw your post. ok, for your 1st q, are you wanting to know how you do it in game, coz thats straight forward.
if you want to know how the different parts are put together, in the textures .bigs, there are loads of skins etc, and CAH sticks each part together along with ini coding for animations etc that come with each type of hero. the CAH file probably then refers to each file and where it goes etc, so the finished hero has parts from many different files. i doubt this makes much sense, but i hope i began to answer your question.
and with your tutorials: 3rd Age website:
http://3rdage.net