Quick php edits - ASAP

My site offers gift certificate which are sent by email as a random code so they can be redeemed when returning for purchases. Each product has a field where the code can be entered for the discount. This is the needed modifications: Currently, the only option is to purchase one gift certificate at a time. I would like to make it so that people have options to buy 1, 2, 3, 4, 5, 6, and so on... Also, there needs to be a field for them to enter a mailing address when they purchase the gift certificate. This address along with the gift certificate code needs to get emailed to the site admin. Currently the admin gets CC with the gift certificate code on purchases in an email anyway. So you would just need to add the address information to it. Purchases are by paypal. budget $45 MUST be available to complete it now.