OK, so I've managed to do this, finally, with a bit of guidance from a grand master at JKI (thank you!)
There are instructions included in the LabVIEW help on how to prepare your VIs for the Example Finder. This information can be found in the help, go to the Index and type "Prepare", then select "Prepare Example VIs for NI Example Finder dialog box". The help refers to a LabVIEW tool used to create a database file known as as a bin3 file that defines your example VIs by location, category and keyword. Make sure your example VIs are already in the <LabVIEW>\examples folder, under a s