Modify OS Commerce MS 2.2 PHP with ignore payment option with $0 totals for free download items

I need help modifying the checkout process of the open-source project to ignore the payment and shipping options for order totals that are $0. This would occur if a customer checks out with one of the free downloads on my site. I want to send them through the check-out process to gather information to communicate with them in the future and to get them familiar with checking out at my company's site, but I do not want them to see the payment options if there is nothing to pay for. I prefer someone with experience in PHP and MySQL, but will consider others who have experience with open-source projects in general. As such, I will require that any developments be posted back to the open-source project for others to use. The contribution must be submitted under my company name as the primary contributor with mention of the coder as the secondary contributor. This requirement assumes that you are not adverse to open-source projects and that your coding efforts will be released to the open-source project community for use by anyone with no proprietary rights be retained by my company Xiloe Teknowledgies or you the coder. If you are proficient with PHP and MySQL and understand the OS Commerce package, I will be glad to propose future work, as I have tweaks that I need made for my e-commerce purposes. Thank you for viewing my proposal. ## Deliverables 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 Linux, and the OS Commerce e-commerce project, and the PHP and MySQL versions required by OS Commerce Milestone 2.2.