Widgets and Harcoded Plugins alltogether in a sidebar ?

Hi ??
I am currently used a template i downloaded and slighthly modified a long time ago.
Tgis template was “Widget Ready” but at the time almost every plugins asked to add some code in the sidebar for showing up stuff.
So my sidebar is something like:

<?php if(function_exists('ns_show_top_commentators')) { ?>
    <li id="topposter">
      <h2>
        <?php _e('Quelli che i commenti...'); ?>
      </h2>
      <ul class="no-splitted">
        <?php ns_show_top_commentators(); ?>
      </ul>
    </li>
    <?php } ?>

Now, if I add a widget all my plugins are no more shown.

is there a way to keep handcoded PHP+HTML and widgets together?