The past contribution from tchmnkyz only works in english, dont be selfish, please work for multi language, not only your language.

I tried to install the past 1.0 and 1.1 version (both) and It did not work because it (both) contain a bug.

In the following line:
$new_mail_subject = EMAIL_TEXT_SUBJECT . ' - ' . EMAIL_TEXT_ORDER_NUMBER . ' ' . $insert_id . "n" ;

please discard the . "n" because it wont work.
FULL PACKAGE + Small Fix (version 1.2)
All credits for Werner