Magento PayPal CronJob - Fraud False Positiv

PaypalFraud.php

<?php
class PaypalFraud
{

    const PAYPAL_FRAUD_LOG = "paypal_cron_fraud.log";

    public function changeFraudStatus()
    {
        $collection_of_orders = Mage::getModel('sales/order')->getCollection();
        $collection_of_orders->addFieldToFilter('status',array('fraud', 'payment_review'));
        foreach($collection_of_orders as $order)
        {
            self::Log("Suspected Fraud / Processing Review check: Changing order #" . $order->getIncrementId() . " to \"Processing\"");
            $order_new = Mage::getModel('sales/order')->load($order->getId());
            $order_new->setState(Mage_Sales_Model_Order::STATE_PROCESSING, true, "[CRON] Order automatically changed to \"Processing\"",false)->save();
            if(!$order->getEmailSent()) {
                self::Log("Send Order E-Mail#" . $order->getIncrementId());
                $order_new->sendNewOrderEmail();
            }
        }
        if(count($collection_of_orders) > 0)
        {
            self::Log("Fraud detected");
        }
    }
    
    protected function Log($message)
    {
        return Mage::log($message,null,self::PAYPAL_FRAUD_LOG);
    }
}

Hi,

could you put a short documentation on how to install this as a cron? Thanks in advance,

Philipp