For me the most successful advertising co-op is the S Builder co-op. You can set it up by clicking the Power Tools tab and clicking on the CO-op Manager from the drop box. Follow the instructions and you are set. It really works. You will have to purchase at least 1 unit of S Builder form TripleClicks. I have 3 units and set the co-opp which generates PSAs for me and my active downline (PSA and CSA).