modules positions header1 + header2

Hi,

In the templateDetails.xml we find module positions header1 + header2.
In the template settings ...

admin ...../administrator/index.php?option=com_templates&task=edit&cid[]=gk_twn2&client=0

we find under dimensions: Header2 column width var.

But on the modules positions of the demo:

http://demo.gavick.com/joomla15/jul2011 ... &Itemid=60

The positions are not mentioned?!?!

How tu use this 2 positions?

Regards,
rené