A new Finale instruments file is now available for download. This file lets Finale recognize the JABB update "Lite" instruments. Do a search on your system for the "GarritanJazzinstrument.txt" file. Replace the old file with this new one: www.garritan.com/JABB/Finale/GarritanJazzinstrument.txt
For Windows users the file will be in the Finale 2006/Finale VST folder. After replacing the old file with the new, when you open the Finale Setup Wizard you should see the addition of the many new "Lite" choices in the listing of the JABB instruments.