Using query_posts() you can pass 'post_type=custom-post-type' it will however not work with a category associated with default posts but instead you can pass the custom taxonomy name are the value taxonomy=taxonomy_value
You’ll need to do something like:
query_posts(array('post_type' => 'customposttype', 'posts_per_page' => 72,
'custom_taxonomy_name' => 'custom_taxonomy_value', 'order' => 'ASC'));