I'd prev used Apple DLS Music Device for Soundfont files, but DLS is no longer available from the Add tracks menu. I believe that I have Setup -> Interapplication correct...?

The Sounfont files appear in Garageband, but "grayed out". I'm really not sure of the adverse effects that software install would have on my DP 4.12 app, preferences, projects, etc. I performed Software Update to get me back to 10.3.9, and this is now my only unresolved "artefact".
I appreciate any help from the Forum.
Bobby
MOTU 4.12 / OS 10.3.9 / MOTU 828mkII /