How do you customize RSS feed templates

I do not get hello world as the title. This is what I have (I changed the name of the view from feed_trulia to feedtrulia to rule out that causing a problem so that is not a typo).

/**
 * plugin that actually displays an RSS feed
 */
function phptemplate_views_rss_feedtrulia($view, $nodes, $type) {
  if ($type == 'block') {
    return;
  }
  global $base_url;

  $channel = array(
    // a check_plain isn't required on these because format_rss_channel
    // already does this.
    'title' => "HELLO WORLD",
    'link'        => url($view->feed_url ? $view->feed_url : $view->real_url, NULL, NULL, true),
    'description' => $view->description,
  );

  $item_length = variable_get('feed_item_length', 'teaser');
  $namespaces = array('xmlns:dc="http://purl.org/dc/elements/1.1/"');

  // Except for the original being a while and this being a foreach, this is
  // completely cut & pasted from node.module.
  foreach ($nodes as $node) {
    // Load the specified node:
    $item = node_load($node->nid);
    $link = url("node/$node->nid", NULL, NULL, 1);

    if ($item_length != 'title') {
      $teaser = ($item_length == 'teaser') ? TRUE : FALSE;

      // Filter and prepare node teaser
      if (node_hook($item, 'view')) {
        node_invoke($item, 'view', $teaser, FALSE);
      }
      else {
        $item = node_prepare($item, $teaser);
      }

      // Allow modules to change $node->teaser before viewing.
      node_invoke_nodeapi($item, 'view', $teaser, FALSE);
    }

    // Allow modules to add additional item fields
    $extra = node_invoke_nodeapi($item, 'rss item');
    $extra = array_merge($extra, array(array('key' => 'pubDate', 'value' =>  date('r', $item->created)), array('key' => 'dc:creator', 'value' => $item->name), array('key' => 'guid', 'value' => $item->nid . ' at ' . $base_url, 'attributes' => array('isPermaLink' => 'false'))));
    foreach ($extra as $element) {
      if ($element['namespace']) {
        $namespaces = array_merge($namespaces, $element['namespace']);
      }
    }
    
    // Prepare the item description
    switch ($item_length) {
      case 'fulltext':
        $item_text = $item->body;
        break;
      case 'teaser':
        $item_text = $item->teaser;
        if ($item->readmore) {
          $item_text .= '<p>'. l(t('read more'), 'node/'. $item->nid, NULL, NULL, NULL, TRUE) .'</p>';
        }
        break;
      case 'title':
        $item_text = '';
        break;
    }

    $items .= format_rss_item($item->title, $link, $item_text, $extra);
  }

  $channel_defaults = array(
    'version'     => '2.0',
    'title'       => variable_get('site_name', 'drupal') .' - '. variable_get('site_slogan', ''),
    'link'        => $base_url,
    'description' => variable_get('site_mission', ''),
    'language'    => $GLOBALS['locale'],
  );
  $channel = array_merge($channel_defaults, $channel);

  $output = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n";
  $output .= "<rss version=\"". $channel["version"] . "\" xml:base=\"". $base_url ."\" ". implode(' ', $namespaces) .">\n";
  $output .= format_rss_channel($channel['title'], $channel['link'], $channel['description'], $items, $channel['language']);
  $output .= "</rss>\n";

  drupal_set_header('Content-Type: text/xml; charset=utf-8');
  print $output;
  module_invoke_all('exit');
  exit; 
}

Hopefully I am doing something obvious wrong. also the file views_rss.module was in modules/views on my site, assuming that was just a typo but thought I would point it out incase it is not. Oh and thanks for the new explination as I was going in a completely different direction.

Thanks again.