change header

I want to change the header that is currently on www aaawebuyhouses com (the big house pic only and not the name of the site)to the one on the attachment. I also do not want to change the tabs or anything else just the picture of the big house. You may have to resize the new header in the attachement so it fits the way I want but that's it.I think this should be quick and easy and will pay 30.00 to get it done quickly. Ask any/all questions PRIOR to bidding please. Thanks!!