Hello
In register.php at line 215 ( "$mail_message" ) to 219, str_replace is used 5 time.
$mail_message = str_replace('<base_url>', $pun_config['o_base_url'].'/', $mail_message);
$mail_message = str_replace('<username>', $username, $mail_message);
$mail_message = str_replace('<password>', $password1, $mail_message);
$mail_message = str_replace('<login_url>', $pun_config['o_base_url'].'/login.php', $mail_message);
$mail_message = str_replace('<board_mailer>', $pun_config['o_board_title'].' '.$lang_common['Mailer'], $mail_message);
But, with a little modification
$replace = array('<base_url>', '<username>', '<password>', '<login_url>', '<board_mailer>');
$replace1 = array($pun_config['o_base_url'].'/', $username, $password1, $pun_config['o_base_url'].'/login.php', $pun_config['o_board_title'].' '.$lang_common['Mailer']);
$mail_message = str_replace($replace, $replace1, $mail_message);
no ?
(sorry, i'm french and i'm a big sh** in english )
bye !