Whilst on the subject, do people prefer registry entries or ini files for saved configuration settings?
Either way's fine with me.

I did mean to store the last used load and save paths.
I'll scratch that one off my wishlist

It uses simple linear interpolation, except for the head which isn't quite right yet (it should probably be in line with the body)
While it would be nice to have the head in-line with the body, your current implimentation matches how it works on the empeg: The head is always straight vertical. If LowerBody.Y >= Shoulders.Y then it's striaght down, else it's straight up.