John,
pipeline started a thread in BIAB wish list about this, with detailed info on how to. Also, VideoTrack contributed by making visual presentation on how this might work with sliding menu. Please vote.

More on this topic... Can anybody please explain the idea behind this "Topper"? It seems that VST items are present and recalled from "plugin" tab at the mixer...Maybe this whole topper is not needed at all, to be attached to VST window, but would work as a separate menu button on the actual mixer track "plugin" tab? Meaning, it stays in limbo unless you recall it.

regards,
Misha.