OS Thumbnails wanted, if possible

I generally have a LARGE number of .mscz's in my download directory, loaded from people either reporting bugs or wanting (or needing) musical help, with non-obvious names. I wish MuseScore could supply a "Quick Look" (Mac talk) to the operating system, I know Windows has something similar), so .mscz's would be "good citizens" like PDF's, images, and .odt's and show a "thumbnail"in the Finder/Windows Explorer. They do it, so it'd be nice if MS could do it, to. I realize .mscz is a zip format; I hope it's possible such; it'd be a shame if not.