title: Magento: overriding frontend phtml files without placing in default/default
body: <p>I have a custom info.phtml file which is already working if placed at app\design\frontend\default\default\template\sales\order\info.phtml.</p>
  
  <p>However, I do not want to use this approach since this is part of a module, so if later someone else overrides this file it'll brake the functionality. I've read about using custom blocks but I tried many different approaches without success.</p>