418669 Need to add a payment page

I have the following website for a conference I am having in October: [login to view URL] What I would like to do is under the "Register" page, I would like to add a way to take credit card payments online, or simply link to my Paypal account. I need to be able to have people come and pay online somehow. Additionally, I would like to have an area on the payment section where people can input a code (I only need one code) to save 10%. I really need to have this up and running by Monday morning at the latest as it's about to launch. Thanks.