I'm pretty sure I have the basic skeleton right with all the bone names, but it's all the extra stuff that allows characters to do things like hold a weapon in their hand when they have it drawn, or cast spells. The WEAPON node, for example, seems to be causing an error when I try previewing my custom race in the CK. "MODELS: Weapon bone (WEAPON) on () does not have zero children, weapon reparent may fail." There's also the magic node that I'm really confused about. I have no idea how to get that to work, there's several child nodes for those in Bethesda's skeletons that I don't know anything about.