Someone

$sql = "SELECT t., u.username, u.user_id, u2.username as user2, u2.user_id as id2, p.post_username, p2.post_username AS post_username2, p2.post_time 
	FROM " . TOPICS_TABLE . " t, " . USERS_TABLE . " u, " . POSTS_TABLE . " p, " . POSTS_TABLE . " p2, " . USERS_TABLE . " u2
	WHERE t.forum_id = $forum_id
		AND t.topic_poster = u.user_id
		AND p.post_id = t.topic_first_post_id
		AND p2.post_id = t.topic_last_post_id
		AND u2.user_id = p2.poster_id 
		AND t.topic_type <> " . POST_ANNOUNCE . " AND t.topic_type <> " . POST_GLOBAL_ANNOUNCE . "
//-- fin mod : announces ---------------------------------------------------------------------------		
		$limit_topics_time
	ORDER BY t.topic_type DESC, t.topic_last_post_id DESC 
	LIMIT $start, ".$board_config['topics_per_page'];
if ( !($result = $db->sql_query($sql)) )
{
   message_die(GENERAL_ERROR, 'Could not obtain topic information', '', __LINE__, __FILE__, $sql);
}