you question is not so clear for understand. Anyway i try to respond... You can use 'hierarchical' => true when you declarate you new custom post type.
For placing this new menu in some other position in your admin are use the proprety 'menu_position' => 5,.
Example (to add in your functions.php file):
add_action( 'init', 'create_my_post_types' );
function create_my_post_types() {
register_post_type( 'mycustompages',
array(
'labels' => array(
'name' => __( 'My custom pages' ),
'singular_name' => __( 'My custom page' )
),
'public' => true,
'hierarchical' => true,
'show_ui' => true,
'publicly_queryable' => true,
'exclude_from_search' => false,
'menu_position' => 5,
'supports' => array( 'title', 'editor', 'comments', 'trackbacks', 'author', 'excerpt', 'custom-fields', 'thumbnail' ),
'rewrite' => array( 'slug' => 'mypage', 'with_front' => false ),
)
);
}