Debug Zen Cart Checkout / Shipping

We have a Zen Cart store and we have installed and configured the Ceon Advanced Shipper, and the fast checkout from "20 Surefire Ways to Increase Sales Using Zen Cart". Currently the shipping options are not coming through properly on the 'Review and Submit Order' page. Whatever option the customer chooses on the previous page, the shipping listed on the 'Review and Submit Order' page is always the first option. Ceon (the advanced shipper people) suggest that the current fast checkout has broken the ability of the software to record the chosen shipping option in the session. I'm not sure whether there is something wrong with the Fast checkout from "20 Surefire Ways to Increase Sales Using Zen Cart", or something wrong with the way we have installed it or the way we have removed the previous custom files (before installing the checkout from "20 Surefire Ways to Increase Sales Using Zen Cart", we had a custom checkout which got shipping options from a table 'zen_deliveries'), or whether there could be something wrong with the Advanced Shipper. Continued in deliverables section . . . ## Deliverables This bid is to get the fast checkout from the "20 Surefire Ways to Increase Sales Using Zen Cart" to work using the Advanced Shipper module. IMPORTANT - the checkout from "20 Surefire Ways to Increase Sales Using Zen Cart" is part of the template fancydress3 and should not affect the site if other templates are used instead of this one. 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Zen cart