When you look at Lucid Dreams, and the way to actually have them, it is mostly about programming your subconscious mind so in fact Subliminals would be one of the best ways to do that. Furthermore, you’d still want to remember your experience, as with anything related to higher conscious you won’t be able to comprehend once your state declines back to a lower one.
Scripting to make bring awareness to your dream state and scripting to make force you to write your dreams down are probably gonna be mandatory in a title like this.
Let’s hope for the best.