boy have I been sleeping...
Been caught up doing other things not entirely carpc related... I should be able to get back to some more things in the next few days.
I did realize that when you added the 'onartclick' feature that it's actually a part of the mp3art plugin, not a specialized command. So I'm going to be installing that plugin and giving it a try - and removing that line from the exectbl.
I'll still be taking some time to figure out the radio changed you had mentioned... I started to look at it, but it'll take a while to make sense of it.
Stay tuned... I haven't forgotten - since I'm using it every day.