I was reading a beginner's book on lucidity... the way they encouraged someone to get lucid was very, very similar to the EELD idea you're working with. They mentioned, during your WBTB, to turn the contrast down on the TV so the light wouldn't bother you, and to turn the volume down very low... so that the words are almost indistinguishable. And just listen as you fall asleep. You'll notice that the conversations start taking on a life of their own, so they encourage you to start playing with it at this point... guide the conversations. Or let them develop, but remind yourself that you're falling asleep and dreaming this.