Customize Order Confirmation Email - Add Field

[Toot4fun]

I modified my account creation procedure to include a "Who referred you to us" box. This value is stored in my database in customers.customers_referral. I'd like to edit my Order Confirmation email to include this new field. It looks like I'll have to edit /classes/order.php, but there are a few arrays that refer to customer data and I want to make sure I modify the right one (so far, my guess is the customer[] array).

Once that's done, what else needs to be done to actually display this value in my email?

Thank you!

[enigma777]

did you ever get a response on this. I have a similiar situation and it has to do with date of delivery. I am already collecting the information, just need to add it to outgoing email.