animtools saves out text files that describe the position you created.
to load a position, you can:
use the load key (deafult is f2),
use the load button on the animtools modpage
have the position named to the special name 'animtoolsposition.txt' that is placed in a character folder
press a mapped quickload key defined in the settings file, and have the position file in the loader's 'Settings' folder
call the special dialog tag [ANIMTOOLS_positionfilenamehere] and have the position in the loader's 'Settings' folder
don't know if that is what you are asking, as your question is a bit odd.
some vague things in question:
no one has ever described animtools as a launcher, but i suppose that works
saving vanilla characters? trying to save vvanilla characters while using loader? saving position files?