This may be a different solution, since I do not have GPO or JABB. I have been attempting to wean myself off arranger keyboards(Technics KN7000) to achieve maximum quality while playing live. Naively,I thought one could simply apply a cc #and produce vibrato.

I have Kontakt 2 and Collossus. I soon found out that, because of the extreme flexability possible in these programs, one has to go into the engine and make your own,unless you use KS or scripts. I chose to go into Kontakt,chose my waveform,assign LFO's,choose frequency, and use velocity as a controller.

I hope you two have an easier solution, but ,at least I can identify with your frustration.