Making Logo almost full width of header

I know I saw it somewhere, but I can't find it now. I wanted to change the look of the header -- and I am really new to css's and php's.
So I did this to header.php:
// added defines for header alt and text
define('HEADER_ALT_TEXT', 'The MagicFoxxx Den :: All things foxy.');
define('HEADER_SALES_TEXT', '');
define('HEADER_LOGO_WIDTH', '750px');
define('HEADER_LOGO_HEIGHT', '129px');
define('HEADER_LOGO_IMAGE', 'logofox.jpg');
define('HEADER_LOGO_FLOAT', 'center');

and this to my stylesheet:
#logoWrapper{
background-image: url(../images/blackslice.jpg);
background-repeat: repeat-x;
background-color: #ffffff;
height:129px;

And now I can't find where I set the width of the page. (800? 850?)

I am only local so no URL to give you. I hope I got the image attached.

Since I'm here, where do I go to change the font color for the ezpages nav bar in the header?

Thanks
John

The page width is defined in #mainWrapper

The EZ-Pages links at the top take the default link color defined for a:link and a:hover, unless you explicitly define them to be different by adding #navEZPagesTop a:link and #navEZPagesTop a:hover