"Well, John, you post back here when you get it to work......."
Oh ye of little faith - LOL
I usually try things out before posting and do have it working as I've described above,(the paragraph beginning "If a chord sequence")
ie. the MP's silently drive the style with whatever chord sequence is pre-recorded into them (with looping set if required). You can still play manually over most of the keyboard depending on where the split point is set.
But don't expect recording on the fly to be added anytime soon!
I mentioned it as a possible Tyros workaround for Scott's topic, (following on from Tapas' workaround) or as a technique in its own right if anyone can make good use of it. If someone does want to evaluate it, I can provide more detail including a midi template if necessary.
John