Is it possible to make Zen Cart act as shipping and payment processor only on some products. I have a Store front with categories and products etc and this works great couldn't ask for more. However, we are also a custom apparel designer and we have HIGHLY customized products that can be customized in millians of ways. I have already written a system to gather the required info as well as all the pricing etc that works as a "quoting system". What I would like to do is basically pass an order with minimal details into Zen Cart and have Zen Cart handle the credit card portion and shipping portion from there on. I can I guess do this manually with a lot of core hacking but I am hoping something already exists out there that will help with this.