Craiglist auto poster - repost

I'm Looking for software to Auto Post Free Ads On craigslist. The software should have the ability to post Several adds for diferent Cities and Diferent Categories, to post text and pictures from my computer. The software must chek the adds published every 3 days and republish them if they have been eliminated. This will be done for a given period. The sofware will work on manually created accounts. Craigslist Only lets you post 16 adds per account. SO the software should be able to handle more than one account so we can post several adds, several TImes.