Hey, heads up, this plugin doesn't play nice with VisuStella's Message Core. I know there's a good chance you can't fix this, but if you use the Message Core it won't allow these Message Actions to play out. I tried to use this alongside the message core, but... yeah, it just shows the actual brackets and doesn't play the action.
(Ignore the 002, that's an old screenshot from when I thoguht you had to type it out as \PCE[002].)