Ted, I play a kn6000, not a 7000, so I can't help you except to say that when I play "Silver Bells", I pick one of the waltz tempos (even the jazz waltz) and eliminate most of the accomp except strings ... I then use the various voices on the kn6 to provide the 'Christmas' sound ...
I am not near my kb right now, but I will try to remember to check my registrations (IF I saved them !!! )...
t.