getting avatars to work in postbit outside of forums directory?

[sabret00the]

how would you go about doing this?

this is how i'm fetching the postbit

PHP Code:

    while ($post = $db->fetch_array($posts))
    {
        $cell++;

        if ($tachyuser)
        {
            $fetchtype = 'post_global_ignore';
        }
        else if ($ignore["$post[userid]"])
        {
            $fetchtype = 'post_ignore';
        }
        else if ($post['visible'] == 2)# OR ($thread['visible'] == 2 AND $postcount == 1))
        {
            $fetchtype = 'post_deleted';
        }
        else
        {
            $fetchtype = 'post';
        }

        $postbit_obj =& $postbit_factory->fetch_postbit($fetchtype);

        $postbit .= $postbit_obj->construct_postbit($post);

    } //got all that info
    // let's rewrite the postbit links and make the images work    
    $postbit = str_replace(
        array(
            'member.php',
            'private.php',
            'search.php',
            'sendmessage.php',
            'profile.php',
            '<!-- / post #',
            'imwindow',
            '400, 200); return false;">'
        ),
        array(
            $vbulletin->options['bburl'] . '/member.php',
            $vbulletin->options['bburl'] . '/private.php',
            $vbulletin->options['bburl'] . '/search.php',
            $vbulletin->options['bburl'] . '/sendmessage.php',
            $vbulletin->options['bburl'] . '/profile.php',
            '<hr style="visibility: hidden; padding: 0.25em 0 0 0; margin: 0; line-height: 0em" />' . "\n\n" . '<!-- / post #',
            'grps_imwindow',
            '400, 200, \'' . $vbulletin->options['bburl'] . '\'); return false;">'
        ),
    $postbit); 


but the question is how to i get the normal avatars (not the custom ones to work as they use relative links)

and as you'll have some custom ones and some normal ones you can't just rewrite the whole $post['avatarurl'] any suggestions?