Auto Ip Changer

I want an ip changer which will work with my craigslist bot. The ipchanger will count the number of captcha challenge or post complete screens that appear. Once the number specified has been reached the Auto ip changer then 1. pause my CL bot, disconnect my internet connection (dsl) 2. delete cookies and/or delete browsing history(temporary files) [login to view URL] for the specified time specified, reconnect my internet connection thereby changing my ip [login to view URL] my bot and repeat the process over.