I have implemented wp-supersized to create a full-width background that dynamically resizes. You can find more about it here.
Check out what I have done so far at this link.
My challenge is with a fixed height header set at 154px. I want the top of the image to start right after the header, without cutting it off.
It seems like the plugin is using the full height of the browser, but I would like to change that. Any ideas on how I can achieve this?