title: Override Mage/Core/Controller/Varien/Action in Magento
body: <p>I've done my best to figure this out, but I can't seem to get the following Controller to override in Magento:</p>
  
  <p><strong>Mage/Core/Controller/Varian/Action</strong></p>
  
  <p>Right now I have the following files for my extension:</p>
  
  <p><strong>app/local/MyCompany/MyModule/Core/Controller/Front/Action.php</strong></p>
  
  <p><strong>app/local/MyCompany/MyModule/Core/etc/config.xml</strong></p>
  
  <p><strong>app/etc/modules/MyCompany_MyModule.xml</strong></p>
  
  <p>My confusion lies in the config.xml.  I've previously overwritten Controllers found in the <strong>controllers</strong> directory, but not the <strong>Controller</strong>.  I'm not entirely clear on the difference or if the method for overriding files in the Controller directory is different.</p>
  
  <p>Here's what I have in my config.xml</p>
  
  <pre><code>    &lt;?xml version="1.0"?&gt;
      &lt;config&gt;
          &lt;modules&gt;
              &lt;MyCompany_MyModule&gt;
                  &lt;version&gt;0.0.1&lt;/version&gt;
              &lt;/MyCompany_MyModule&gt;
          &lt;/modules&gt;
          &lt;global&gt;
              &lt;controller&gt;
                  &lt;Mage_Core&gt;
                      &lt;rewrite&gt;
                          &lt;front_action&gt;MyCompany_MyModule_Core_Controller_Front_Action&lt;/front_action&gt;
                      &lt;/rewrite&gt;
                  &lt;/Mage_Core&gt;
              &lt;/controllers&gt;
          &lt;/global&gt;
      &lt;/config&gt;
  </code></pre>
  
  <p>Can someone please let me know what I am missing?  </p>