Okay, so I tried to install your contribution today, there is still some work left (templates). One problem with the 2.2.ms2 seems to be, that the order status update mails come from a different file than in newer versions of the shop.
The order status updates are still the same old text mails as without any addon. I am very shure, that I have changed all files correctly, the orders.php included. Still the same old ugly, charset-buggy textmail for order status updates.
Perhaps someone can help me... would be nice to be able to change this, as this is a very important mail.