Adding Paid Option for Craiglist clone

Hi , im a webdesigner and Now learning Php , I have got a customer that wanted craiglistclone , i have installed it for him , about paid options : script supports Paid Featured Ads & Paid Feautured events I want to add another option called , Promote Your ad with Sponsored Ads Means when he also choose this feature and pay , there will be a section at the website , called Sponsored Ads and it will show Ads from posters who paid for that option Sponsored Ads will be rotating automaticly and matching every category and city , the same way as featured Ads works Please do not bid more than $40 Max Im 24 hours online Just im me if you need to ingestigate more this is very urgent and would choose programer in the next 1 or 2 hours you can see where the option must appear there : [login to view URL];cityid=23&lang=en&catid=1&subcatid=1 Best regards