Heres some links with info.
http://www.squest.com/Macintosh/Midi...LFeatures.html
http://www.squest.com/Windows/MidiQu...LFeatures.html
http://www.squest.com/Macintosh/Inst...rus/index.html
Looks good on paper..
I'll have see how well it actualy works cause the demo doesnt do the VST support.
Otherwise it seems to be a pretty well featured editor/librarian.