custom osCommerce shipping module

I need a somewhat bizarre shipping module written (or found, if there's already one that does this) for osCommerce that I can use. It needs to be a mixture of the "individual shipping" module, that allows you to define shipping on a per item basis, and the "First item $X, Additional Items $Y shipping". with zones. Basically what I need is this. I have 6 products that need to be addressed. For every product, there is a base shipping price, then for additional products it's $2 extra. 5 of the products have a base shipping price of $10, one has a base shipping price of $5 (for domestic shipping). For international orders, the items that were $10 to ship are $30 + 10 for each additional, whereas the item that was $5 to ship is 10 + 5. *also* because of certain restrictions, some of the items can be shipped together, and some can't. So I need to be able to define that some items can use the same base rate (so it's 10+2+2+2 if they aren't the same item), but some can't (so then it's 10+2+10+2) assuming you ordered two of each item, and they can't be shipped together. I'm using an installation of OSCMAX, if that helps any. I can give you access to the server and db to make changes. ## 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 php, mysql, oscmax