Again, click on the photo to see it somewhat larger.
I'm still getting the hang of stitching photos together in Photoshop, and I just spent an inordinate amount of time trying to do the whole room just right, but the result looked like crap, so here's my very first, but simpler, effort. I'll post the rest of the room (i.e. the other two walls) tomorrow.
Many, many thanks to the one who really made this post possible. You know who you are.