SMF and 404 script

[djilou]

Hi

I use this code to do a 301 redirect from SMF's Urls to vBulletin

switch ($old_system)
{
	case 'smf' :
		$old_forum_script 	= "index.php?board=";
		$old_thread_script 	= "index.php?topic=";
		$old_post_script 	= "index.php?msg";
		$old_user_script 	= "index.php?action=profile;u="; // Append userid
		break;
	
	default :
		// No valid system entered
		die('No valid system entered');
}

// It's for the old forum
if (strpos($_SERVER['REQUEST_URI'], "/{$old_folder}") === 0)
{
	switch ($old_system)
	{
		
		case 'smf'	:
			if(preg_match('#index.php\?board=([0-9]+)#is', $_SERVER['REQUEST_URI'], $matches))
			{
				if (is_numeric($matches[1]))
				{
					$action = 'forum';
					$sql = "SELECT forumid FROM {$tableprefix}forum WHERE importforumid=" . $matches[1];
				}
			}

			// It's a thread link
			if(preg_match('#index.php\?topic=([0-9]+)#is', $_SERVER['REQUEST_URI'], $matches))
			{
				if (is_numeric($matches[1]))
				{
					$action = 'thread';
					$sql = "SELECT threadid FROM {$tableprefix}thread WHERE importthreadid=" . $matches[1];
				}
			}

			// It's a post link
			if(preg_match('#view=findpost\&p=([0-9]+)#is', $_SERVER['REQUEST_URI'], $matches))
			{
				if (is_numeric($matches[1]))
				{
					$action = 'post';
					$sql = "SELECT postid FROM {$tableprefix}post WHERE importpostid=" . $matches[1];
				}
			}

			// It's a user link
			if(preg_match('#index.php\?action=profile;u=([0-9]+)#is', $_SERVER['REQUEST_URI'], $matches))
			{
				if (is_numeric($matches[1]))
				{
					$action = 'user';
					$sql = "SELECT userid FROM {$tableprefix}user WHERE importuserid =" . $matches[1];
				}
			}
		break;

		default :
			// No valid system entered
			die('No valid system entered');
	}

	if (!$action)
	{
		$action = 'log';
	}

}

now I need to edit this code to include urls like that:
http://www.site.com/smf/topic-t1.0.html

how can I do this?