it's a simple directory script, I have a demo of one that’s similar but you would have to add your ads in the header and footer, or where ever else, this is a plain install with no modification ... When people try and add their link you have to approve it via the admin cp so that’s a nice security feature which stops spam. You also have category management and more things inside the admin cp… http://www.yoursourceforinfo.com/cplinks/