NOTE: You will see each baner have code in right side. in this code you will see url look like

http://www.curlyworm.com/cgi-bin/t.cgi?a=451548

You just need to change in this url a={your affiliate number} for example if you affiliate number is 451548 so your link will be

http://www.curlyworm.com/cgi-bin/t.cgi?a=451548 . when you signup with affiliate system so you will get your affiliate url in email, you can replace that url here as well.