I think it's easier to publish the code here then answer each PM individually.
As an attachment you can find a screenshot of the platform where I made the modification.
You can see working example (in Bulgarian, unfortunately) on
this page.
The installation process remains the same, except of the code:
Code:
<vb:if condition="$post['isfirstshown'] AND $show['guest']">
<ul>
<li class="postbitlegacy postbitim postcontainer" id="post_{vb:raw post.postid}">
<!-- see bottom of postbit.css for .userinfo .popupmenu styles -->
<div class="posthead">
<span class="postdate old"><span class="date"><a href="register.php" style="color:#FFFFFF; text-decoration:underline;">(No Advertising after the first post? Register now for free!)</a></span></span><span class="nodecontrols">#0</span>
</div>
<div class="postdetails">
<div class="userinfo">
<div class="username_container">
<div class="popupmenu memberaction">
<a class="username online popupctrl" href="register.php" title="Register now and stop seeing ads!"><strong>Google AdSense</strong> </a>
</div>
<img class="inlineimg onlinestatus" src="images/statusicon_custom/user-online.png" alt="Google is online" border="0" title="Google is online">
</div>
<span class="usertitle">Advertising from Google</span>
<a class="postuseravatar" title="Google is online"><img src="images/google.png" alt="Advertising from Google" title="Advertising from Google" /></a>
<hr>
<dl class="userinfo_extra">
<dt>Joined in</dt>
<dd>Dec 2007</dd>
<dt>Address</dt>
<dd>Google.com</dd>
</dl>
</div>
<div class="postbody">
<br />
<!- Your Google Adsense Code with any size -->
<div class="cleardiv"></div>
</div>
</div>
<div class="postfoot">
<div class="textcontrols floatcontainer">
<span class="postcontrols"> </span>
</div>
</div>
<hr />
</li>
</ul>
</vb:if>
The code in red you may change/adapt to your needs.
Good luck!