I've made little more progress in deciphering the
operation
of Carl Claunch's "Lunar Landing" program, as featured in one
of his 1130 YouTube videos. (I'm guessing he's the actual author
of the program -- he mentions on one of his blogs that he was
interested in space before he became interested in computers.)
Alas, not my program. It was one of many programs distributed by Share to
1130 users, thus it was contributed by somebody.
Carl