To change the banners in the left side of the front page of the default design you will need to edit the following template:

/main_page/front_page.tpl

of your custom template set. Open the html source view of the above template within following admin tool:

DESIGN > MANAGER

Those "banners" are simply images included in the design to illustrate that you can place banners there. There is no specific "banner code" outside of an included html image tag and link to the current page. That "banner code" is in between these html comment tags:

     <!-- BANNER BEGIN -->
     <!-- BANNER END -->

To change the banners in the right side of the listing details page of the default design you will need to edit the following template(s) depending on the listing types you use:

/main_page/listing_classified.tpl

/main_page/listing_auction.tpl

of your custom template set. Open the html source view of the above template within following admin tool:

DESIGN > MANAGER

That "banner code" is simply an image surrounded by a link to the current page and only used to illustrate the options you have in client side design management. That "banner code" for the right column looks like this by default:

<div class="listing_rightcol">
	<h3 class="title rounded_top">{$additional_text_3}</h3>
	<div class="content_box_3 cntr">
		<a href="#"><img src="{external file='../images/banners/banner1_160w.jpg'}" alt="" /></a>
	</div>
</div>

To change the banners in the right side of the header of the default design you will need to edit the following template:

/main_page/header.tpl

of your custom template set. Open the html source view of the above template within following admin tool:

DESIGN > MANAGER

That "banner code" location in the design is surrounded by the following comment tags in the above template:

<!– EDIT THE FOLLOWING LINE OF CODE WITH YOUR BANNER OR ADSENSE CODE –>

<!– EDIT THE ABOVE LINE OF CODE WITH YOUR BANNER OR ADSENSE CODE –>

To put your own code there remove what's currently in between the above comments and place your own "banner code".