Small OSCommerce modification

This is for an online store that sells auto accessories. admin: on the edit product screen I want to be able to add a series of car model / make / beginning year / ending year records, which will be stored in a separate table. For example, the other table should have: car_model_id int (example: 1) product_id int (example: 200) car_make string (example: "Honda") car_model string (example: "Accord") beginning_year int (example:1997) end_year int (example:2000) Using ajax I want to be able to add, delete and edit such records from the product page. user: I want a page, using ajax, that allows the user to select a car model, make, beginning_year, end_year (using drop down boxes) and displays the matching products with a link to the product page. You should implement this on your own server, show it to me, once it is working right on your server I will pay half. Then send me the code and I will install it on my machine and pay you the remainder once it is working.