Custom Friendly URLs

[Coroner]

I've tried to create my own friendly URL's but something goes wrong.
Created 2 plugins

PHP Code:

        <plugin active="1" executionorder="1">
            <title>SEOUrl</title>
            <hookname>friendlyurl_fetch_main_fragment_fallback</hookname>
            <phpcode><![CDATA[
if ($this->link == 'gallery')
{
    $titlekey = 'title';
    $idkey    = 'catid';
    $handled  = true;
}
            ]]></phpcode>
        </plugin> 


and the 2nd:

PHP Code:

        <plugin active="1" executionorder="1">
            <title>SEOUrl</title>
            <hookname>global_bootstrap_init_complete</hookname>
            <phpcode><![CDATA[
class vB_Friendly_Url_Gallery extends vB_Friendly_Url_Abstract
{
    public function __construct(&$registry, $linkinfo, $pageinfo, $primaryid, $primarytitle, $urloptions)
    {
        $this->link = 'gallery';
        parent::__construct($registry, $linkinfo, $pageinfo, $primaryid, $primarytitle, $urloptions);
    }

    public function output()
    {
        $customfragment = $this->get_main_fragment();
        $pagefragment = $this->get_page_fragment();
        $arguments = $this->get_qs_arguments();

        $handled = false;
        if (!$handled)
        {
            switch ($this->registry->options['friendlyurl'])
            {
                case 1:
                    return 'gallery.php?' . $customfragment . $pagefragment . (!empty($arguments) ? $this->amp . implode($this->amp, $arguments) : '');

                case 2:
                    return 'gallery.php/' . $customfragment . $pagefragment . (!empty($arguments) ? '?' . implode($this->amp, $arguments) : '');

                case 3:
                    return 'gallery/' . $customfragment . $pagefragment . (!empty($arguments) ? '?' . implode($this->amp, $arguments) : '');

                case 0:
                default:
                    return 'gallery.php?' . $this->registry->session->vars['sessionurl'] . 'c=' . $this->id . (!empty($arguments) ? $this->amp . implode($this->amp, $arguments) : '');
            }
        }
    }
}
            ]]></phpcode>
        </plugin> 


Next is the part I can't ..... believe.
In class_friendly_url I've found the part:

PHP Code:

    public static $friendlies = array(
            'showthread'   => array(
                'primaryvar' => 't',
                ... 


Now, when I add this code (hardcoded):

PHP Code:

            'mygallery'      => array(
                'script'     => 'gallery.php',
                'primaryvar' => 'c',
                'ignorelist' => array ('c', 'catid'),
                'rewritevar' => 'gallery',
            ), 


to the class I works correctly. But when I'm adding this CODE by a plugin like:

PHP Code:

        <plugin active="1" executionorder="1">
            <title>SEOUrl</title>
            <hookname>global_bootstrap_init_complete</hookname>
            <phpcode><![CDATA[
vB_Friendly_Url::$friendlies['mygallery'] = array (
    'script'     => 'gallery.php',
    'primaryvar' => 'c',
    'ignorelist' => array ('c', 'catid'),
    'rewritevar' => 'gallery'
);
            ]]></phpcode>
        </plugin> 


it doesn't work.
To test if it works I'm using this:

PHP Code:

$myurl = fetch_seo_url('gallery', array('catid' => 2, 'title' => 'Title 1')); 


Does anyone know, what I'm doing wrong ?

Cheers
Coroner