really force magento orders complete

gistfile1.php

<?php
/* @var $collection Mage_Sales_Model_Resource_Order_Collection */
$collection = Mage::getResourceModel('sales/order_collection');
$reflection = new ReflectionMethod( Mage_Sales_Model_Order, '_setState');
$reflection->setAccessible(true);
foreach ($collection as $order) {
    /* @var $order Mage_Sales_Model_Order */
    $reflection->invoke($order, 'complete', 'bulk_complete', 'force complete', false, false);
    $order->save();
}