How can I use for example the "Autofit Two Columns" container in my pages.xml for my own portal definition (sample-portal).

My pages looks like this at the moment:

<page>

    <name>TestApplication</name>

    <title>Portal</title>

    <access-permissions>user</access-permissions>

    <edit-permission>admin</edit-permission>

    <portlet-application>

      <portlet>

        <application-ref>MyWAR</application-ref>

        <portlet-ref>TestPortlet1</portlet-ref>

      </portlet>

      <title>Portfolio list</title>

      <access-permissions>user</access-permissions>

      <show-info-bar>true</show-info-bar>

      <show-application-state>true</show-application-state>

      <show-application-mode>true</show-application-mode>

    </portlet-application>

    <portlet-application>

      <portlet>

        <application-ref>MyWAR</application-ref>

        <portlet-ref>TestPortlet2</portlet-ref>

      </portlet>

      <title>Portfolio analysis</title>

      <access-permissions>user</access-permissions>

      <show-info-bar>true</show-info-bar>

      <show-application-state>true</show-application-state>

      <show-application-mode>true</show-application-mode>

    </portlet-application>

    <portlet-application>

      <portlet>

        <application-ref>MyWAR</application-ref>

        <portlet-ref>TestPortlet3</portlet-ref>

      </portlet>

      <title>Position list</title>

      <access-permissions>user</access-permissions>

      <show-info-bar>true</show-info-bar>

      <show-application-state>true</show-application-state>

      <show-application-mode>true</show-application-mode>

    </portlet-application>

  </page>

I want now the first two portlets place in an autofit two columns container. How can I do that?

Thanks a lot.