Output all associated categories for directory listing

I am trying to output ONLY the categories associated to the listing on the _sginle.php page in an attempt to customize the output. Near as I can tell, $PPTDesign->CustomFields($post,”???”); SHOULD work, but I don’t know what to use in place of ??? to pull out all of the associated categories, and b) when I test using $PPTDesign->CustomFields($post,”state”); it just displays ALL of the custom fields, even though the class file shows a field paramater can be passed. I’d really like to see some solid developer documentation for this theme 🙁 For now, suggestions? Maybe I am way off?