I love the way Artisteer themes have built in widget areas above the content and sidebars, but what if you want to place a full width banner or ad above both of these? This is an easy tutorial on how to do just that!
First add the following code to the bottom of your header.php:
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<div class="top-ad" style="width: 100%; text-align:center;"> YOUR AD CODE </div> |
Next add the following code to the bottom of your style.css:
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/* ad area above content and sidebar */
.top-ad {
position: relative;
margin-top:1px;
margin-bottom:-5px;
z-index:3000;
}
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You may have to tweak the margins in order to get the right position for you, but these will get you close. 
Introducing a brand new WordPress Thesis Theme for 2012 I specifically created for the Frugal Blogger. This two column custom theme has 4 built-in widgetized areas in the header and footer. Other built-in widget areas make switching out ads a breeze (Above content, below content, after posts, after 1st post only, after 2nd post only, after 3rd post only, below footer). Click 
