If you go to their demo page: http://www.filamentgroup.com/examples/menusHierarchical/
you can grab all the needed files (which appears to be 3 js and a css file) using Firefox and firebug
If you go to their demo page: http://www.filamentgroup.com/examples/menusHierarchical/
you can grab all the needed files (which appears to be 3 js and a css file) using Firefox and firebug