P.S. Are plists the right way to exchange macros? Snippets, commands, and the like are easy because they're just plain text, but macros are a different beast...
Dear Trevor,
It's a good question - I can't actually see how to install your file. But thanks for the hint that macros were the way to achieve what I wanted - my own "quick-and-dirty" effort works well enough for the moment.
Best wishes,
N