What do I need to do to use DLS and SoundFont files?
Very Little! Just put the .dls and .sf2 files in either of two places: Library/Audio/Sounds/Banks or Users/yourAccount/Library/Audio/Sounds/Banks Intuem will pick them up and turn them into MIDI devices automatically when you start it or open the panel in preferences. The devices are as simple to use as QuickTime Musical Instruments and require no further set-up, although you may want to give them new names.