International Checkout

Hello,

My client would like to use a payment processing company called International Checkout. Basically, when a customer is outside the U.S., they click a button that says international orders and all the items in the cart transfer to the international checkout cart and the order is completed on their site. They collect the money then buy the products from us and ship it out for us.

I was wondering what file I would add the form to pass the info over to them or if it is even possible? The pdf attached explains it better.

Thank you, I hope we can use the company as it will save my client many headaches.