Alignment issues/header images/image maps

Here’s my wordpress page: http://flimsywhipped.com/writing/

I’m trying to customize the images used to fit the style of site. Right now, I’m just experimenting. But what I’d like to do is be able to match the header image up with the page itself (see the website, you can see visually what I mean). The header image was originally in the CSS style sheet, but that made it difficult to use an image map (which in turn calls a PHP page up), so I pulled the image out of the CSS page and put it into the header file, so I can use a regular HTML image map. However, now I’m having alignment issues. Any ideas?