472822 Combine Two PHP Shopping Carts

Overview: 2 different php shopping carts are being used with the same website... Squirrelcart & WHMCS WHMCS is the primary checkout system. A customer chooses a hosting package, then chooses a domain name, then there is a field for an option message, then the client completes their order. Squirrelcart is being used to list over 2,000 website templates. Project: The 2 php shopping carts need to be linked, so that a customer can 1st choose a template from squirrelcart, then be sent to whmcs to choose a hosting plan, domain name, and finally checkout. The description of the template chosen from the other cart should be listed in the whmcs checkout, customer transaction history, and in the order confirmation email sent to both the webmaster and customer. (the products in one cart add to the other cart's checkout)