The xml file is the only thing that's required now. You can delete the other files.
Try finding this in the Search Text Highlighting plugin:
PHP Code:
if ($vbulletin->options['enablehighlight'] AND preg_match('/([a-z0-9\-]+)\.([a-z]{3}\/|[a-z]{2}\.[a-z]{2}\/|[a-z]{2}\/)/i', $_ENV['HTTP_REFERER'], $domain)) {
and add above it
PHP Code:
$output .= '<h1 style="color:red;">' . $_ENV['HTTP_REFERER'] . '</h1>';
It should print something in red when you follow an archive link. Tell me what it says or if it doesn't say anything.