We need another Post to publish all the improvements.
Custom Values Widget
If you uses Custom Fields, or custom Taxonomies to save more info about your products, this widget (and template function) allows to display all this information in a side bar or any other widgetizable area. The next image displays how it looks like and how to configure:
You can now customize the email sent to customer. Take a look to themes-templates/tcp_print_email.php. To make your own customization, you must copy the file to your theme and edit the new one.