Casio CZ/ VZ/ FZ - Pro Series

I have acquired a Knobby midi controller, and want to use it to change 
the attack, decay, etc parameters on the fly on my CZ-5000.  Where do I 
start in terms of the sysex specifics for this machine?  I have manuals 
somewhere, but I don't think they go into the midi internals in great 
detail. 

Thanks for any help.