How could I change "title : page 2 0f 3" to " title (2/3) "

Hi,

Yes, the theme_smart_paging_page_title_suffix() is the one that you need to override to change the the page title suffix. You can override that at your template.php (found at your theme folder) and you can add something like this:

/**
 * Theme for smart_paging_page_title_suffix.
 */
function phptemplate_smart_paging_page_title_suffix($variable) {
  static $title_suffix;
  static $set_title_done;
  if (isset($variable['page'])) {
    $page = $variable['page'];
    if (isset($page['suffix']) && isset($page['current_page']) && isset($page['total_page'])) {
      $title_suffix = '(' . ($page['current_page'] + 1) . '/' . $page['total_page'] . ')';
      // $variable['bypass_drupal_set_title'] can be set at:
      // THEME_preprocess_smart_paging_page_title_suffix()
      // MODULE_preprocess_smart_paging_page_title_suffix()
      if (!$set_title_done && !isset($variable['bypass_drupal_set_title'])) {
        // Target head title (<title> tag)
        drupal_set_title(drupal_get_title() . check_plain ($title_suffix), PASS_THROUGH);
        $set_title_done = TRUE;
      }
    }
  }
  return $title_suffix;
}

You're welcome.