Well, I got a definitive answer, but it wasn't satisfying: that company had gone out of business, and we had to create our own patches for our fall 2009 production of Ragtime. However, another company, Realtime Music Solutions, is now providing computer-based patches for several MTI and R&H shows, although not, unfortunately, for Ragtime. We are currently using their product for the three synth books for Aida, and are pleased with the result: good sounds and incredible ease of use.