The Apertus Website Header is a toolbar on top of all Apertus websites to make navigating between different systems /CMSs easier.
The header is an iframe with 42 pixels height that has to be added to the theme of each respective website/cms.
File: /skins/Vector.php line 124 after $this->html( 'headelement' ); ?>
<iframe width="100%" scrolling="no" height="42" src="http://www.apertus.org/header?page=wiki" frameborder="0"></iframe>
line 247 after <?php $this->printTrail(); ?>