I suppose that the point 2 is resolved.
So I will return to point 1. Yes now I understand it.
MediaMonkey plugin I know very well. That would be weird otherwise, because I wrote it.
MB and MM plugins can not have exactly the same options, because MM API and MB API are quite different.
But I hope it will be possible to somehow solve it.
It seems that it could be possible to use the API method
Playlist_SetFiles.
I can not find anything else. I have to try it. I do not know how it works.
If it adds tracks to the playlist, then it will be easy.
Otherwise, it would probably be only a workaround and we had to ask for an extension API for the new method.
But I have to apologize. Now in June I do not have time. I'll be able to start working on it until July.
Pako