For some the skill will be there, though I dare say many, perhaps most, do not (one could say our company has three programmers, yet I would bet only one of us would be able to do what you did) - but more often it's the problem of time, not curiosity - plus weighing time vs need.
And like I said, technically you haven't "solved" the initial issue of this not showing under now playing, the bottom info bar or the media screen saver , though it's a neat way to bypass that, using the pop-up with a url call. Now, on to rewriting the DVD changer driver to the iPod or media player proxy .