title: Magento: send status changed with custom email template
body: <p>I'm working on some improvements inside PayPal extension for Magento and I have set to module send an email to customer after order status is changed. I have used the code below for each different status within PayPal order controller:</p>
  
  <pre><code>$order-&gt;sendOrderUpdateEmail();
  $order-&gt;setEmailSent(true);
  </code></pre>
  
  <p>I would like to send custom email templates for each status, for example, when order is cancelled, the customer gets this message: <em>"Hi dear customer, we are informing you that your order #123456 has been cancelled for some reason..."</em>. How can I use the functions above setting Magento to send an email calling the custom template I have created for that specific case? Is it possible?</p>