Hi Les,
I have an MC500 MKII that I've been using for a couple of years. My keyboard is a Kurzweil PC88MX that I have midi'd to the MC500II.
It would probably be easier for me to explain some basic recording operations to you over the phone. We could email and agree on a time, and I'll do what I can to help you out.
(814) 453-5839 Dan Reese