Great, I'll go with that. Thanks johntchow, and I hope it doesn't infringe on any copyrights.

As far as the icon itself toggling with the current state, that would be rather complicated as an icon is just a static resource in an executable. The .exe would have to alter itself. Also, the OS does not refresh icons constantly anyway, it caches them for speed, so even if the icon changed the OS would not always show the current icon.