castleking

Please help me as I am totally stuck. I have an essay to submit which I have completed but i have constructed it into 4 chapters with different headers and footers and of course page numbers. I can print it out perfectly and it looks great when Its all put together. However I have now been told that I cannot submit it for marking unless it is submitted electronically as one complete document. I have messed about with it but cannot get it to merge as one ducument with everything looking right. I am using word 2007 can anyone help me? If you can please instruct me as if I was a very stupid person because I am. thanks