Joomla (virtuemart) Customization

I have a website built with Joomla 1.5.x and a shopping cart installed as VirtueMart. I have three products that require custom emails to be sent to the customer after they order. Basically, when the customer orders my 6 week email class, virtuemart automatically sends them a custom email from me. That email will have instructions for the customer as to how to sign up for the email class. There are three separate products and each product requires a separate email to be sent. I need this done ASAP. funds will be escrowed.