here's a definite reason for no chords in DigiTrad (except for the few that someone else submitted). There is no such thing as a "right" chord in a song. I'm exceptionally weary of having people tell me, "Oh you're using the wrong chord"; I'd much rather have folks try things for themselves. If you're totally chord-challanged, there's a nice sharewarer program called ABCMUS which will set chords to any of the songs in DigiTrad. It has a "strangeness" control for picking a level of chord complexity from 0 to 100.

I recommend personal experimentation, and perhaps a bit of theory study.