For people interested in how this extension works: The contents of each column are simply rendered using the native “normal” Typo3 methods which get used for rendering a column. When the content of another page than the actual needs to get rendered because there is no content on the actual page then the UID of the parent page is simulated to the rendering methods. In fact I overwrite “$GLOBALS['TSFE']->contentPid” temporarly and set it back to the original value after rendering the column. Some people meant that this could lead to unexpected results with the other rendering but AFAIK the value of $GLOBALS['TSFE']->contentPid is never transferred to a another variable.