Hi, thanks for the kind comments!
Augmented Reality isn't just a RED supplement, it's useful for any cyberpunk-style game (I was playing Cyberpunk 2020 A LOT when I wrote it, way before RED was released). Although I can definitely state that my book would be very handy for running RED solo (spread the word).
I do have plans to expand on Augmented Reality, hopefully releasing a second book complimentary to the first (AR Plus is just a few extras as a thank you to folks).
I'm not quite sure how to describe my process, other than to say have a vision in mind of the types of things you would feel evocative and relevant to a cyberpunk environment, try and list as many as you can, then weed out the weak-sauce stuff.