I'm thinking of using this layout for some PSL asylums, but I can't figure out how to add a header and a background! The header is the same width as the layout, and centered at the top, while the background will be tiling. I've tried adding the background/header HTML but it isn't working.
Secondly, can you add a one-pixel border around the whole layout? (I'll be changing the colours of the layout, if that is okay!)