What Variables to display user name in Most_active_topics or Most_viewed_topics

Hello HelpForumotion , I want to display user name in Most_active_topics or Most_viewed_topics as Mod_recent_topics

In Mod_recent_topics :

Code:

<!-- BEGIN classical_row -->
    <!-- BEGIN recent_topic_row -->
        <!-- BEGIN switch_poster -->
        {classical_row.recent_topic_row.switch_poster.U_POSTER}
        <!-- END switch_poster -->
    <!-- END recent_topic_row -->
<!-- END classical_row -->

And what's Variables in Most_active_topics or Most_viewed_topics

How should I do ?

My forum version : PUNBB

Sorry , my English is ugly Thanks

BUMP