With ZPU being so insanely effective regarding changing/establishing patterns, my guess is, a Lucid Dreaming module would be quite possible.
One of the easiest ways to get into Lucid Dreaming is to (honestly) ask yourself during the day several times if you are dreaming or if you are awake until your subconscious starts to do so during the dream phase.
So the module’s core function would be training to do just that: Continously reassess if you are dreaming or awake.