Bob -- I'm don't have them routed to any tracks yet. I'm just trying to demo and play around with it. I can hear the other soft synths just fine (like Session Drummer, and S1 String Section), when I open a brand new synth track and just click around on the drum pads or strings in the GUI.
Sidroe and Gtrpima, I'll have to try that thanks for idea.
Bill - that's not what Finale support told me at all. I spoke to them directly about this very issue, and they said I'll be fine just importing the DLL from the Garritan folder.