Hi de llio,
You can edit the current layout file on your template. Example: open the main-right.xml in "your_site/templates/sj_worldnews/layouts", finding:
<header2 order="2" id="yt_header">
<positions>
<position width="300px" height="" type="feature">@logo</position>
<position width="680px" height="" type="modules">header2</position>
</positions>
</header2>
change to:
<header2 order="2" id="yt_header">
<positions>
<position width="252px" height="90px" type="feature">@logo</position>
<position width="728px" height="90px" type="modules">header2</position>
</positions>
</header2>
Thanks