Multiflex theme is designed with 800x600 screens in mind, but I feel 1024x768 is much more common. At least in my case, users of my site have mostly that kind of width.
At 1024 pixel screen width, a lot of space is wasted. I want to know a way how to configure the page width so that the pages accommodate more contain on the same page. The navigation pane has the same width as the default theme.

Can it be made configurable? If not, at least tell me the changes required to have wide pages.