Hi,
Here is the link for the group http://www.gobiodiesel.com/tiki-index.php

As far as buying anything extra for the vehicle, the only thing will be is Fuel Filters. The Diesel seems to clean out the tanks and you will have to change a few filters. But other then that, just put it in and take off. Also you can go here and make your own,
http://www.biodieselsolutions.com/