Tom Lehrer has a great piece---just called Christmas Carol.Sung to the tune of Hark the Herald Angels Sing.
I also love John Forster's All Purpose Carol.
If you tune in to WFDU 89.1 FM (Teaneck NJ) or on the web
www.wfdu.fm
between 3-6 PM I guarantee you will hear both and a lot more on the TRADITIONS program that day.
Bill Hahn