Very nice notes and photos, and I especially appreciated the sound clips. I've developed a real appreciation for incidental music for plays, and it's nice to hear that BK has the feel for it. Listening again as I type this.
If I had the creative ability to put two notes together I'd try to write some myself, but I am no composer, no sirree. But I happily play other people's notes. I've provided tracks for an Amadeus (the music for it is included in the script) and a couple of other plays in which the intended music (classical or other public domain stuff) is specified, more or less, and you just have to go out and get it and make it happen.
That all gets prerecorded, of course, and then you're done. My absolute favorite was the Act One score which is fully integrated with the play and is played live. It's good dramatic scene setting and underscoring, and it's even written for two pianos, not one. There was no way this particular theater company was going to hire two people, though, and I (mostly successfully) condensed it to one.