Torben,
Are you willing to insert an INI feature where the non-audio items can be coloured to stand out in the playlist ?
Also - Is it possible to add a “title” option for the #mAirList COMMAND parameter - If a playlist contains a variety of different commands, the word COMMAND in the Title field doesn’t mean much unless you insert a Dummy after it to explain it 
Second that as it all could easily get confusing.
Also a set of standard reuseable commands (as text files?) would be useful could be included with the distributable to speed setup of the software going to air as many users may find scripting a little daunting.
First script in mind to detect soundcards and then enable the user to quickly select which input to mute/unmute and how long for.