Btw, where's the developer's website?
I wanted to add hierarcy to the custom post, and it wasn't so easy :-/ But here's how I did in case anyone else wants to
Search 'hierarchical' around line 230. Set hierarchical => true
Just below it set 'supports' => array('title','editor','comments', 'page-attributes'),
('page-attribues' needs to be added to that the metabox to choose which parent it goes under becomes visible.)
With that change the info in the columns when showing all projects disappears. So:
Search for: 'manage_posts_custom_column' around line 150. Change that to 'manage_pages_custom_column'
Then we're golden!
http://codex.wordpress.org/Plugin_API/Action_Reference/manage_posts_custom_column - end of first paragraph mentions the need to change the hook if hierarchical.