I am currently using the bezel artwork for each specific game in MAME and not the GameEx bezel.  Many of the games I play have a large bezel that takes away from the actual game.  Many of them are fine,  but my girls like puzzle bobble for instance.  The bezel is a majority of the screen.  Is there a way to choose a different bezel if there are multiples or can you change the sizing in some way?