I've included a link containing several Word documents and all of the necessary images. The attachment will have all of the written content and imagery that you need.
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WIth regards to layout width, please make the #wrapper 960px wide. We're happy with leaving the background white.
For the image that will reside in the header, please make sure that you code the dimensions of the image in the HTML instead of allowing the image to be displayed at it's native dimensions. I don't want the user to be able to upload a image of the wrong size that will break the layout. Instead, the HTML should force the size of the image.