Can you import skeletons from previous games?

I don't have any previous games, and wasn't planning on getting any. But I would really like to add a crossbow unit to the game.

I understand that you cannot create new skeletons, but would it be possible to swap a crossbow skeleton in from Medieval Total War? [IS THERE a crossbow skeleton in MTW?]

Just curious. Has anyone tried to swap anything between games before?

MTW doesn't use 3D models, it used 2D sprites instead.