Add Multiple Products for SPPC

for osCommerce Online Merchant v2.2

This is a modification of the original "Add Multiple Products" contribution (,1129). This contribution provides another replacement for the standard product listing module. It allows the customer to submit multiple products, with multiple quantities per product. It also takes account of attributes assigned to a product {not as far as I can tell- djmonkey1} It has been adapted to work with Separate Pricing per Customer. ***Do not use this contribution if you are not using SPPC.***