Help with our Amazon store (changing categories)

We have a demo posted at [login to view URL] The site is run using the script at [login to view URL] All I am looking for is someone that can assist me in changing the store categories. For example, from the current theme of DVDs to one of the main categories on Amazon (http://amazon.com/gp/site-directory/ref=topnav_dir_d/104-8341044-9712734) like Music, Magazines, etc. There is a file (that I attached here) that controls the store. I need to find where the 'Node' is at on Amazon so that I can change categories. I posted this project on GAF, someone did for me and now I can't get a response back from emails. So, I won't keep emailing but I do expet to be shown exactly how to change the theme and where I find these nodes. I can't seem to get this one right. Very quick, easy project. This will be a quick $30. Need ASAP. Thanks, Rob