Musikman,

The ins files are just for documentation. Instead of choosing patch 24 in bank 156 you will be choosing "space guitar" in the "flower power" bank. But you will need a GM or XG device for the auto accompaniment. If there is no GM bank in the Korg (I don't see one in the ins files you pointed to) then you should use another device for the accompaniment. Maybe the soundcard in your PC has a reasonable sound. You can still use the Trinity for the melody with layers and autoharmony if you use the Midi Mapper to assign channel 1 thru 8 to the Korg and 9 to 16 to a GM device.

If you are going to make your own styles then you can use the Trinty for auto accompaniment. Revoicing as BP suggested is also possible. You can use the drumtrack converter to convert the drumnotes if you first make a table that reassignes each XG drumnote to a similar Trinity drumnote.

Still with only 32 polyphony on the Trinity I would get an extra GM device.

Jos