centering the header image

look in your theme’s style.css – back it up 1st! – for

/* header area */

#header {

	width: 900px;

	height: 350px;

        padding-top: 50px;

	position: relative;

border:none;

}

#headerlogo {

	margin: -350px 0px 0px 15px;

you will likely want position: to be “float” instead of “relative” and will want to play with margins

Is float a valid value for position?..

no surely not – in a hurry – “relative” is what you want

The image in the header is 950px (plus border) = 952px…

This looks good on my screen (change or add where appropriate in your stylesheet).

#header {margin:0 auto!important;width:952px;overflow:hidden}
#suckerfishnav {width:100%;}

NOTE: You have 2 defintions for #header in your stylesheet, move the border style from the second into the first, then delete the second..