title: How to upgrade magento 1.5 mage all latest to the beta version
body: <p>is it possible to do this through mage? if so how . when I try </p>
  
  <pre><code>    ./mage install http://connect20.magentocommerce.com/community Mage_All_Latest
  </code></pre>
  
  <p>it just tries to install the same version 1.5.1.0    putting upgrade would do the same.   how to tell mage install to install the beta version? </p>