I just dumped all the files in the SImon1 directory, and it worked immediately. I'm guessing it's setup to look for the overrides, but default to standard if not exist.
(unless I was fiddling about and somehow set it without knowing before this the links were posted)
You can go into the ScummVm dir in the game dir, and run ScummVM from there, where you can set various sound/audio/control options.
Yeah it does seem to automatically look for and use any of these new files.
very good the music is too, although it does at times sound a bit too much like the original (tavern)