Viewing the attachment, you can see the top left portion of the site. The black/white vertical line is the boundary of the content area, the red box indicates the bounds of the PNG I'm hanging off the side a little bit.
Using absolute positioning, I can put the PNG anywhere with no scrolling. I don't like using AP when I don't have to, though.
PGO, the background method won't work for this, but I did do something similar to pull off the top aligned header, slicing it where it meets the content boundary and using the pixels outside that in a background image set below it, then I created another div below that with a 4px wide gradient bar which I then tiled across the top.
Is there not a way to avoid using AP to accomplish this?