Ad Injector - Repost - open to bidding

I am looking for someone that can build an ad injector software. I am talking about injecting ads into pages visited by the user's browser, all the sites that everyone goes to. The ads should appear as banners and they should be in number of 2 maximum (depending on the page's space). I want to choose the ads that will appear based on geo-targeting. For example if the user is from Australia I would have 5 or 10 offers that would appear. If he is from Greece he would have 5-10 ads that are specific to his country. I already have my Mozilla Firefox browser infected with such a virus, I have attached screenshots for you to make a better idea of what I want.