Custom Shipping Charts

Ok, so if you check out my site www.rainbowracing.com you will see that it is a huge site with several items. I purchased the dynamic suite so that I could make our generic products available for online purchase. I am now stuck on the shipping. Here is what I have done so far: Set up 174 items in the products db that was provided by webassist. Pictures and everything are working properly on the search, detail etc pages. I added the security and now I am at the add to cart object. However, I chose to manually create my own shipping but I cannot find documentation on it anywhere on how to go about doing so? Our business is a mail order business but our rates are determined at the begining of the year and we use the rates based on zip codes. We use FedEx & UPS, if I create a table for this in the database can you please direct me on how I should go about doing this? Also, you will see that every product we offer is less expensive the more you buy (quantity discounts), there are 174 individual products with individual prices, weights, colors - so do i have to create 174 recordsets and 174 different buttons. I am a little confused here and need some guidance fast.

PLEASE HELP!