The dutch genealogical search engine http://www.stamboomzoeker.nl uses gendex to index family trees.

EXAMPLE:
Root address: http://www.website.nl/humo-gen
Your URL: http://www.website.nl/humo-gen/gezin.php?id= (Don’t enter anything after the xxxxx)
Gendex file: http://www.website.nl/humo-gen/gendex.php
Privacy filter: not necessary, the gendex.php file filters persons after 1920. It’s possible to adjust it.