Lyndel,
I was thinking of working out the code alternatives and through trial and error figure out the missing functions. I didn't know about Makehex, but I chickened out and just returned the JVC DVD recorder/VCR combo. I bought a new-in-the-box Panasonic, complete with remote.

Thank you very much anyway! As others have noted, you are amazing. This is an awesome community.

I may just research the MakeHex anyway. I'd like to find descrete codes for my Pioneer TV's picture-in-picture function that toggles through three settings once it is initiated, before it returns to a single picture.