What exactly do you want to do?
Skins & Templates > Skin Manager > [click on skin] > Edit Root Skin Template HTML > All Global HTML > global_board_header
Look for this ...
CODE
<div id="logostrip"><a href='{ipb.script_url}'> <!--ipb.logo.start--><img src='style_images/<#IMG_DIR#>/logo4.gif' style='vertical-align:top' alt='IPB' border='0' /><!--ipb.logo.end--></a></div>
Skins & Templates > Skin Manager > [click on skin] > Edit Root Skin Stylesheet (CSS Advanced Mode)
Look for this ... (or similar)
CODE
#logostrip
{
background: #ffffff;
border: 0px
height: 100%;
margin: 0px;
padding: 0px;
background-position: center;
background-repeat: no-repeat;
cursor: pointer;
}
If you need any help, tell us exactly want you want to do.