Thanks, I'll have a play with the states to see what I can do.

My suggestion would be to create two states for each figure, one with briefcase and one without, so the player who gets the briefcase could do a simple state toggle. If you lock both the figure and the briefcase in place, you could use the position and rotate gizmos to get it roughly in the right place to look like he's holding it, when creating the alt state; then connect them with the combine tool and unlock the combination. Hope that makes sense.