This is a Multifunction printer which does print, fax, scan, etc.
Using the driver above to install in a Windows print server, the 'HP MFP Send Fax' dialog will be displayed and the user can configure the fax feature.
With the setup using CUPS 1.1.17 and Samba 3.0.20, create the print queue using CUPS, access to the samba share as a print admin, use the Printer Properties windows to install the same driver, the 'HP MFP Send Fax' would not be shown. There is no installation error from Samba and it reported the drivers in the 'enumdrivers' output. However, the fax feature is not configurable.
This is probably fixed with a newer Samba version. If you still see the error. Please open a new bug with 'debug level = 10' logfiles of the new Samba version 3.5 or 3.6. Thanks!