Thanks a lot though I can't understand most parts, but I can tell you the result is by far the best!

@ Ann, yes it would be fairly easy to show all the banners in a single column. Just remove this line from demo.php:

$bannerGroups = array_chunk($banners,4);

And the second foreach block in the same file:

< ?php

	foreach($bannerGroups[1] as $ban)
	{
		echo '<li>'.$ban->html().'</li>';
	}

?>

The only thing left for you to do is to modify a bit the first foreach block to loop through the $banners array, and not the $bannerGroups[0] array like this:

foreach($banners as $ban)
{
	echo '<li>'.$ban->html().'</li>';
}

This will show them in a single column.