If I know my product_id(s) and cart_quantity(s) is it possible for me to concatenate a URL (or do a form post) to a Zen Cart page that populates the user's shopping cart with multiple items/quanitites simultaneously? Or perhaps a plugin that enables me to do this?

Something along these lines:

http://shop.MyZenCart.com/index.php?main_page=shopping_cart &
action=add_product &
products_id1=1111 &
cart_quantity1=7 &
products_id2=2222 &
cart_quantity2=8 &


My client has a Zen Cart and has asked us to create an application that allows users to create their own design (using the clients products) and when they are done, they want the user to be able to click a button and be brought to their zen cart that is populated with all the selected items and quantities.