Just to follow up to my earlier note about getting StudioRack to work in Harrison Mixbus, after running another VST scan it suddenly started working there in a limited way -- I can't bring up a plugin's GUI within the rack, but I can define a chain in another DAW like Sonar, assign controls to the rack's knobs, etc., save it to the preset menu, then within Mixbus I can load that preset with the controls assigned like I wanted. Neat!
Even if you can't add non-Waves plugins to this rack (still unclear on this point), this might be a useful tool for those who work with Waves plugins in multiple DAWs. Now, if only Waves could simplify their plugin architecture ...
Cheers,
Eddie