PHP shipping calculator

has anyone here made one before?

[httpwebwitch]

I need to build my own shipping calculator, for UPS shipping, and maybe others like FedEx or ground Mail. It's going to be built in to a new e-commerce thing.

For UPS, The Zones and Rates tables are available as CSV files, which is very nice of them.

Has anyone here built one of these before? Is there anywhere I can find something pre-cooked, or at least get some advice before I start?

[jatar_k]

there may be one in here
www.hotscripts.com/PHP/Scripts_and_Programs/Calculators/index.html