Virtuemart order email - bank payments informations

We have joomla 3 – virtuemart 3 website. We need to make some modification when is selected – bank payment on the order page. We have done this similar on other project. Explanation of the project: When some order on the website is done and the client select payment: BANK PAYMENT at the order and confirmation email in the footer he should recieve an explanation how to make a payment via BANK transfer.