Steve, the freeze trick is a pretty good idea. But I already use the freeze for other functions.
Now how's this for an idea:
If creating an individual sysex message for each style is impractical, why can't they use regular controller messages? Actually, that would be even better as there are a lot of midi controllers that can't send sysex.

While we are on the subject, if they could make the tempo controlled via a CC message, it would make a lot more sence than the current sysex implementaion.

Thanks for listening,
Michael