Index of /code/wp-amazon

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 wp-amazon.php           2007-06-30 14:02  8.0K  
 js/                     2007-06-30 14:01    -   
 README.TXT              2007-06-30 14:07  320   

WP-Amazon version 2.0 Beta 1.1 by Rich Manalang
Modified to work in WordPress 2.2 by Jacob Lundberg

Install Rich's WP-Amazon version 2.0 Beta 1.1, then...
Copy or upload the contents of this folder into your wp-content/plugins/wp-amazon/
(Some files will be overwritten / replaced.)
That's probably all you need to do.