If you want a graphics header like this,then follow the below steps.
The script used to display those horizontal scrolling graphics is as follows:
<iframe frameborder='0' height='158' marginheight='0' marginwidth='0' scrolling='No' src=' http://site.personnel.free.fr/scroller.htm' width='100%'/>
To do this,firstly back up your template.Then go to Dashboard-Design-Edit HTML
Expand the widget [x] ,Find the code below(Use keyboard shorcut Ctrl+F for fast finding)
<div id='header-wrapper'>
and past the code just below
now you can see like this
<div id='header-wrapper'>
<iframe frameborder='0' height='158' marginheight='0' marginwidth='0' scrolling='No' src=' http://site.personnel.free.fr/scroller.htm' width='100%'/>
preview and save the template