Adding extra ordering instructions

[Guest]

I'm not sure exactly where the best forum category to ask this- but here goes:

 

I have a web site that has a mixture of products, some are handled by the company's inventory and some are drop-shipped by a vendor. I have built a new table in my database that relates the "Supplier" to the product_model in the oscommerce database.

 

Whenever an order is processed, I will need to examine the cart's products and separate them based on the supplier. For the products that come from the drop-shipper, I have PHP code that will automatically transmit the drop-shipper's required info if I can access the specifics of the cart and its products.

 

I have never had to modify anything is osCommerce, so I am painfully unfamiliar about each of the files used. I was hoping someone could jump start me by telling me what file has the cart processing in it and how I can access the cart's contents- (is it a class, array, ?). And most importantly, does anyone see a flaw in my thinking about how to handle this? Thanks all!

 

Jason