title: click "checkout with paypal" in magento to open new window
body: <p>Paypal wont open in an iframe, so I am trying to make paypal open in a new window or tab when the checkout with paypal button is pressed, using Magento 1.4+</p>
  
  <p>I guess I add a target="_blank" somewhere, but I dont know where.</p>
  
  <p>There are a load of files in \app\code\core\Mage\Paypal\ but I dont know which to edit, adn would prefer to do it without using core files</p>
  
  <p>I found this for paypal express in  app\code\core\Mage\Paypal\Block\Express\Shortcut.php </p>
  
  <pre><code>protected $_startAction = 'paypal/express/start';
  </code></pre>
  
  <p>How would I just open that in a new window?</p>