I have used the pronto with the 3802 and did not
need discrete codes. If you can learn into the
elan this should work....

The denon remote has an option to hit the rcvr
button and it cycles between regular and zone
2. Once your in zone2 the power and inputs only
operate zone2.

I made a page on the pronto for zone 2 and learned
those buttons.

If you need them, I can send you the ccf.

Jason
www.electronics2you.com