I guess this is a very typical design, there is a full screen background image, and a centred wrapper for the content with a white background. The left and right edge of this white wrapper there is a neat shadow a few pixels wide. Similar to this site.
What is the best way to achieve this? Background image (and if so, on what and how?) or border, something else? Any help appreciated.
Edit: I need this to be supported on IE7.
For support back to IE7 I’d recommend using an image. Your image would be placed on the body tag aligned top / center and repeated on the Y-Axis. The image itself would be one pixel in height and as wide as it needs to be for your design. Anyone who is competent with photoshop could create this for you.