custom php ajax script mod for oscommerce site

i need a custom shipping mod for products that will allow me to enter number of boxes and individual weights for said boxes example 3 boxes (2) at 45lb (1) at 15lbs has to be table based and intergrate with ups and fed ex shipping modules for accurate shipping prices i assume it would be in php and ajax with a table base to enter data also must be able to intergrate with products example i do printing 12pt 14pt 16pt stocks each of these options have different weights and box counts as well as different presses use different size boxes so this mod needs to tie int the attributes of site for accurate shipping as well as once done and installed needs to work with ups and fed ex real time shipping quotes