139919 New header needed

I am looking for soemone who can create a great header. The problem is the ecommerce software I use prevents a standard header to be used as one needs to be re-sizable to fit a given window, higher resolution version needs to be created. I still think a photo with a width of 1000 px would be perfect. I do have to admit this is one of the worst hacks I have had to do to get around one of IE's many flaws. To fix it I resized the image with a width of 800 px which is the size of the smallest screen resolution (actually it needs to be 799 px, one px smaller than the screen resolution). The majority of the people on the web have 1024 x 768 so we could probably get away with making it bigger or if someone could figure out how to cram more pixels into the smaller size. I need a new header made to fit and work with my current Cart