So does that mean that pages based on templates included with iWeb can not be made wider via the iWeb user interface? Is it true that you can not alter the image in the page header and navbar-background via the iWeb user interface?
The themes that I've found to be the most user modifiable are Black, White, Formal, Modern and Modern Frame. They don't use image files that limit the size of the page. I will select the one of those 4 based on the color of the navbar text so it is most visible with the design of the site.