Just download it
It is limited to run 13 days if not registered - AND it can SAVE even in the demo!
Yes - it uses bones. I guess it would not work without.
I have not created my own animations with this tool but it replays .X animations and exports them well into MDL7.
I can NOT export into a GameStudio file format below MDL7.
So, if you use A5 or A6 Standard this tool would not make you happy if you need direct export to mdl 4 or 5.
(You simply can't use it in your game then).
-- slacer