title: Magento helper call from template from outside module
body: <p>I am using Mage::helper('addmultiple') where addmultiple is my module name Mycompany_Addmultiple_Helper_Data in Data.php in my modules helper. it gives a fatal error and why it tries to locate Mage_Addmultiple_Helper_Data instead of Mycompany_Addmultiple_Helper_Data</p>
  
  <p>xml entry in my global block</p>
  
  <pre><code>&lt;helpers&gt;
      &lt;addmultiple&gt;
          &lt;class&gt;Mycompany_Addmultiple_Helper&lt;/class&gt;
      &lt;/addmultiple&gt;
  &lt;/helpers&gt;
  </code></pre>
  
  <p>note that when i call this from my block file or controller file from same module it is working.</p>
  
  <p>I am trying to call this from some overridden core template right now.</p>