Modified Magento Buy Button to send to External URL

in all shopping carts, visitors can click on "buy now", so they can register, pay for an item and check out. We need to be able to change the "buy now" button for some products, so instead of going to registration, it will INSTEAD go to an external link. Basically we will not be taking the orders in our website. We are an affiliate, so we will be inputting the URL to external website(s) for each product. here is what you have to do, 1. modify the admin / edit product detail section to add a new field for "Affiliate URL" (2 hours) 2. Modify the Front End (Product Grid Page & Product Detail Page) "Buy now" button to detect if "Affiliate URL" field has a URL it should not add to cart, instead it should send to an external link. (3 Hours) 3. When visitors are sent to an external link. We will show a thin frame from our website above the page, so clients can come back to page if they want to. I will design this in Photoshop. So when you open an external link, you have to target the button frame. Easy work. (1 Hour) Note: The Magneto 1.6 shopping cart is already installed. So you don't have to spend time to install it. In Conclusion this is a 6 hour job + maybe 2 hour of bug fixing. = 1 day job. i pay $10 p/hr