Finally, I tried attaching a 48 second video clip demonstrating the end result using ESU sound file SO761, and having configured the upper headlight so that the Mars effect can be selectively toggled. However, I got a message to the effect that the file size may be too large (??? 48 seconds ???). Beats me. Anyway, it was a fun little project and I learned a bit more about the LokProgrammer.
Again, apologies for the posting foibles and clumsy inelegance, but it was worth a try and I genuinely wanted to give a little something back, but still so much to learn. Thanks for reading.