for the release button there are 2 way to use it, one with just pussinf shortly and one olding the button down for 2 seond.
So, when you use a midi controler, it's just a kind of deported button, so it works exactly the same.
For the break button, on cuelux there is only one way to use, and so i cannot create a new features to the break button using the midimap...