Overwrite styles

function _advanced_forum_add_files() {
  // This could get called more than once on a page and we only need to do it once.
  static $added;

  if (empty($added)) {
    $added = TRUE;
    $lineage = advanced_forum_style_lineage();
    $lineage = array_reverse($lineage, TRUE);
    $theme_path = advanced_forum_path_to_theme();

    foreach (array('structure.css', 'style.css', 'images.css') as $css_type) {
      $css_file = "$theme_path/advanced-forum.$css_type";
      if (file_exists($css_file)) {
        // CSS files with no style name in the theme directory trump all
        // to provide a theme specific style override.
        drupal_add_css($css_file);
      }
      else {
        // For each style from the current style on up through each parent
        // style, look for the style specific CSS file first in the active
        // theme and then in the style directory.
        foreach ($lineage AS $key => $path) {
          $css_file = "/advanced-forum.$key.$css_type";
          if (file_exists("$theme_path/$css_file")) {
            // If the style specific file is in the theme, use that.
            drupal_add_css("$theme_path/$css_file");
          }
          elseif (file_exists("$path/$css_file")) {
            // Otherwise look in the style for it.
            drupal_add_css("$path" . "$css_file");
          }
        }
      }
    }

    advanced_forum_load_style_includes();
  }
}

"elseif (file_exists("$path/$css_file")) {" This wont happen cos there will be double // cos of $css_file = "/advanced-forum.$key.$css_type";