Add Paypal Express Checkout to ASP/SQL Ecommerce Site

We have a ecommerce web site running on asp 3.0 and sql 2000. We are looking to add Paypal Express Checkout to our shopping cart as a payment option. The implementation will need to pass to paypal and to recover from paypal all necessary information, including customer bill-to, ship-to, tel number, payment totals and payment information, AVS code, confirmed address status. Bidders with prior documented success with this kind of implementations are encouraged to specify such experience when they bid. Please bid only if available to handle it now as we need to complete promptly.