Ross has enlightened me (a little!): "BBC Scotland is National but diverts to regional areas during the news and goes back to Radio Scotland. So Radio Shetland Radio Orkney, Radio Highlands & Islands etc etc all are Radio Scotland ! Confused yet !
The MW channel is sort of unique in that it is the same channel but obviously different studios splitting between Sport (Radio MW) & Music (Radio FM) at night."
Obviously I became confused when the BBC's (atrociously [IMHO] redesigned) schedule pages listed only two of the many possibilities and referred to them as "FM" and "MW". I wish I knew when vTuner would manage to update all their links -- but if you are feeling adventurous and have some skill at editing text files with vi it does seem to be possible to edit the lines that hold the "presets" inside the b2settings file. Just change the existing line for Radio Scotland MW to
and save the file again.