"Read more" at the end of teaser

I want to put "read more" after the teaser and not together other links. So I lurked this site and after some tries I get the following code (i use php template on drupal 4.6):

<div class="node<?php print ($sticky) ? " sticky" : ""; ?>">
  <?php if ($page == 0): ?>
    <h2><a href="/<?php print $node_url ?>" title="<?php print $title ?>"><?php print $title ?></a></h2>
  <?php endif; ?>
  <?php print $picture ?>
  <div class="info"><?php print $submitted ?> <?php print $terms ?></div>
  <div class="content">
  <?php
    if($main && $node->readmore) {
        $content = "$node->teaser";
        $pos = strrpos ($content, "</p>");
        $content = substr ($content,0,$pos);
        $content .= " ... " . l(t('read more'), "node/$node->nid", array('title' => t('Read the rest of this posting.'), 'class' => 'read-more')) . "</p><hr class=\"incontent\" />";
        if ($node->links) {
        $linkoli=$node->links;
            if ($key=array_keys ($linkoli,(l(t('read more'), "node/$node->nid", array('title' => t('Read the rest of this posting.'), 'class' => 'read-more'))))) unset($linkoli[$key[0]]);
            $links = theme("links", $linkoli);
        }
    print $content;
    }
    else print $content;
   ?>
   </div>

   <?php if ($links): ?>
    <?php if ($picture): ?>
      <br class='clear' />
    <?php endif; ?>
   <div class="links"> &raquo; 
       <?php print $links ?>
   </div>
  <?php endif; ?>
</div>

the only problem I found till now is that "read more" is put in ALL event nodes even if there is nothing else to show (you can look here, the site is in italian "read more" is "leggi tutto").
Cheers, Aress