Large image, zoom and fixed menu???

Large image, zoom and fixed menu???

Hi there, I've been ask to develop a mobile web using jquery mobile. We are running JQM 1.2 and JQ 1.7.2 . We are facing the following case. 1-We need a fixed top and bottom menu (easy thing to achieve regarding some mobile compatibility issues) 2- the main page contains a image with height=1284px and width=2334px  so...
We've managed to scroll it horizontally, however the main problem is that we weren't able to pinch zoom in/out the image and is a must requirement for the client. Then we found that changing the viewport width to the image width we are now able to pinch zoom the large image but... also zooms in/out the fixed top/bottom menues and looks horrible as you can figure out.
So do you know a workaround for this or maybe do you have a better idea???

   Thanks for your time