Is it OK to move admin menu items?

this might work:

add_filter('custom_menu_order', 'my_custom_menu_order');
add_filter('menu_order', 'my_custom_menu_order');

function my_custom_menu_order($menu_ord) {
    if (!$menu_ord) return true;
    return array(
        'index.php', // the dashboard link
        'edit.php?post_type=custom_post_type',
        'edit.php?post_type=page', 
        'edit.php' // posts
            // add anything else you want, just get the url
    );
}