Authorize.NET iFrame Payment Integration & Email Confirmation

I have a website which now uses Mal's ECommerce for processing checkout. Instead, I would like to add to the checkout page a payment button that brings up an [login to view URL] iframe and pass the amount due from the checkout page to the [login to view URL] page. Once there is a successful transaction on [login to view URL] iFrame page I would like to pass the data from the checkout page to an email script which I have begun writing. I have already begun the process but I'm a bit stuck and need some help finishing the process. I have attached the code with this page and you will see a large section commented out which has the new form data and the new button for payment. To sum up what I would like done is, finish the integration of a new payment button to my page which pushes amount due and billing zip code to [login to view URL] iframe payment script. Upon successful transaction, push data from checkout page to an email script which I have begun. I've attached the files with this email. You can see in the [login to view URL] there is a large section of code commented out, these are the new fields which I want to add and the new payment button which I would like to use. [login to view URL] is the file that I want to be triggered upon a successful credit card transaction and was hoping to have the remainder of information passed into that form including all the payment form information and the array containing all the products ordered. I hope this makes sense and thank you in advance for your consideration.