Simple, dont. Just use astores in your iframes, they are made via amazon associate central and can be customised to suit your page. All you have to do is copy code over. Its crude but if your just starting out it is probably the easiest way for you to get it up and running.
What are you using to publish your websites? I have just tried this in Wordpress and it is easy once you know how.
The final page when you are creating your store has a term like "get code". There will be 3 radio buttons, one button gives you the iframe code. In any webpage you already have or any new page you want to create add the iframe code and it's done. This is an untested sample below. <html> <title>My Cool Store</title> <head> <meta name="title" content="My Cool Store"> <meta name="keywords" content="Store, cool, my,"> <meta name="description" content="This is my cool store"> </head> <body bgcolor="#000000"> <img src="path_to_your_logo"> <center> <h2>My Cool Store</h2> <br><br> <iframe src="astore_somecode-20" height="4000" width="800px"; scrolling="no" border=0> </body> </html>