Just what I needed. Only one suggestion... Make the instructions easier to understand. They are written for programmers. I had to read through them like ten times before I understood what to do. You would have thousands more users if you clearly stated how the plugin works. Try this for simple instructions:
The quickest and easiest way to use this plugin is to:
1. Create a jpg, gif or png image and give it the same name as your category slug.
2. Put it in this folder: wp-content/images
3. Now put this snippet of code anywhere in your theme files to make the image appear: <?php c2c_the_category_image(); ?>
See? It's as easy as 1-2-3.