Upload it to your main directory and select "Amazon aStore" as your page template when you create a new page.
Go to Wp-content> themes> pick the theme that you are using> create a new php file (for example "Astore.php")> paste the code into the file. Remember that this is theme specific, so if you change your theme don't forget to repeat the process for the new theme because your astore won't be there otherwise.
I'm using wordpress version 2.7.1. I uploaded my .php (Store) file at the root of directory. Then, i try to choose the template on drop-down list. But there is no template found. The drop down list only contains "Archives" & "Links". There is no "Store" file. Someone help me!
I put one in my wordpress blog- netbook-central.com I have it hosted on a seperate domain though- make sure you change the astore iframe height to 1000 instead of 4000-