Oh man, you're lucky. It took me hours and hours to going through the html by viewing the source codes in the browser and going through all of the php files to figure it out last night. Do this:
Open your sink_Arcade.php file by:
arcade --> skins --> skin_Arcade.php
FIND:
PHP Code:
</td>
<td class="alt1" align="right" valign="top" style="width: 20%;padding-left:7px;padding-top:5px;padding-bottom:5px;">
ADD ABOVE:
PHP Code:
<!-- Google Adsense -->
<fieldset class="fieldset" style="margin: 0px 0px 0px 0px;">
<legend>Sponsored Sites</legend>
<div style="padding: 0px;">
<table cellpadding="0" cellspacing="0" border="0" align="center" width="100%">
<tr>
<td width="100%">
Your Google Adsense Code
</td>
</tr>
</table>
</div>
</fieldset>
<!-- End of Google Adsense -->
That's it, you're done
Edit: Fix a minor mistake
Note:
This line of code <legend>Sponsored Sites</legend> is the "title" of your Adsense block, just like the "Latest Arcade Score" for the lastest score of the arcade. I had "Sponsored Sites" on my, you can change it to anything you want here.