I'm using the UPS shipping option, and my customer has special rates with UPS. 5-10 lbs.=1.5% off | 11-20lbs.-3.5% off...etc...

I have hacked the OsCommerce code in the checkout_shipping.php page so that the numbers returned by UPS are reduced by the proper amount, and they display properly on screen.

How do I get those numbers into the subsystem that calculates the shipping? It looks like some heavy duty array stuff. I tried to set some of the $quotes array to my new number, but it didn't work. The checkout_confirmation.php page still shows the original numbers.

Was I on the right track?

What should I do to get that number to be the actual shipping charge?

Thanks,
Dasher