help with customizing a dusty foot layout?

[ar]

Hi! I've expended all my (admittedly paltry) CSS knowledge trying to figure this out, so I thought I'd put it to you all. ♥

At thraxios, I'm using the Dusty Foot layout and customizing it with images. If you take a look at it right now, you'll see that there's a brown paper background for the journal as a whole and a white paper background for individual entries. In between those, there's a white box.

I'd like to replace that white box with the white paper background so that the entries look like a single sheet of paper. Is this possible with this layout? All I've been able to manage with custom CSS is taking the white box away so that the brown background shows through, and that's really not the look I'm hoping for.

Thanks!

ETA: If possible, I'd like to do the same with the charcoal grey boxes on the header (the long, thin strip behind the links), the side modules, and the strip behind the "top of the page" link on the bottom. Except with my black image, natch.