the huge problem as I see on adding new races is that you have to edit every single armor to add the compatibility with the new race and most other mods that add new armors won't recognize your race as well as all mods that interact in scribts by race level will ignore your new race ... unless I am wrong ...
Bethesda has no rights for releasing any Havok related materials or tools so you will not find a tutorial or anything directed at http://www.youtube.com/watch?v=Cisn0z5KxqM&list=UUFPYvc_Hb0k5CNForvnqdmg&index=1.
To my knowledge I am the only person to have created any CC's for Skyrim mostly because creating CC's is very time consuming vs the alternative of just regurgitating some Retexes or slightly altered Meshes of which I also do !