UPS Shipping Integration

I am looking for a more ACCURATE / FLEXIBLE shipping solution for my website store. Currently we are using price, and destination based shipping modules. I like to add Real Time UPS Rates and Services shipping module to my website. I need the ability for each product and its variants to have fields to enter the L x W x H dimensions & weight of the package for the UPS to calculate real-time shipping with. Any number entered into this field adds that amount to the total shipping cost the UPS Real-Time calculator returns. 1. Use the online tools provided by [login to view URL] (shipping service) to automatically calculate the shipping options and rates based off the quantity and shipping destination. 2. [login to view URL] uses XML to request and receive this data. 3. I can provide you with the UPS access keys, and account numbers. 4. I will need the data choices for shipping options. 5. I want to be able to ship worldwide. My website using PHP & MySQL.