Foren / Cotonti / Support / Making Sed-Dark Wider.

I'm not sure what you mean with "change in order to fix the second bar".

But a problem you are going to run in to is that <div id="header"></div> has a fixed background.
http://ipodtalkcenter.com/beta/skins/sed-dark/img/SED-Dark_HD.gif

It would be much better if you would give the individual bits (#navBar, #userBar, etc, etc...) their own background.
This way their background can stretch along with the content inside.