+1 that is the same suggestion I had for the Biab Plugin (ToDoList #874) as the pickers just read a database file so rather than opening the certain picker window in BBW4 running in the background the Plugin could read the database file directly allowing the demos to be played directly with the DAW audio rather than BBW4 using Windows Media Player that may not be available, it would then just send the chosen track info to BBW4.
Your idea of tabs is good !