custom_post_type_template

function codex_custom_init() {
  $labels = array(
	'name' => 'Books',
	'singular_name' => 'Book',
	'add_new' => 'Add New',
	'add_new_item' => 'Add New Book',
	'edit_item' => 'Edit Book',
	'new_item' => 'New Book',
	'all_items' => 'All Books',
	'view_item' => 'View Book',
	'search_items' => 'Search Books',
	'not_found' =>  'No books found',
	'not_found_in_trash' => 'No books found in Trash',
	'parent_item_colon' => '',
	'menu_name' => 'Books'
  );
 
  $args = array(
	'labels' => $labels,
	'public' => true,
	'publicly_queryable' => true,
	'show_ui' => true,
	'show_in_menu' => true,
	'query_var' => true,
	'rewrite' => array( 'slug' => 'book' ),
	'capability_type' => 'post',
	'has_archive' => true,
	'hierarchical' => false,
	'menu_position' => null,
	'supports' => array( 'title', 'editor', 'author', 'thumbnail', 'excerpt', 'comments' )
  );
  register_post_type( 'book', $args );
}
add_action( 'init', 'codex_custom_init' );