Re MMario's first suggestion, you don't need to find the songs in ABC only - if you have a MIDI file you can use utilities like midi2abc to convert them and then use something like Harmony if you can't put your own chords. (Is the online version of the DT all MIDI now? If not I can supply you with the entire Fall99 version converted to either abc or MIDI - I spent an hour or so running a batch conversion of them all from Songwright).

Mick