http://www.sidefx.com/index.php?option=com_content&task=view&id=445&Itemid=263 [sidefx.com]

http://www.moondeer.net/pub/sidefx/snail.zip [moondeer.net] (8.4MB)

the project files are not included on the official sidefx tutorial page above.
i've placed them here for download until sidefx adds a link on their own page.

cheers!