[Phpwebsite-developers] Problems with the Restricted Access Hack

[Alan K H. <p1...@FD...>]

I'm having a lot of trouble understanding the "Restricted Access Hack" that
was posted at:
http://www.phpwebsitemanual.com/index.php?module=announce&ANN_user_op=view&ANN_id=173

My problem is when it gets to point 4 of the readme file:
Through Layout in Control Panel or through direct access to your layout
table in the database, associate content with specific theme variables

I have no idea what this means.  Can someone help me get a grasp on this?