I could fix it!

I deleted
echo '</div>';
(Line 402 of install.xml)
And now the mod found fine!
Before:
<div class="bordercolor">
<div class="clearfix windowbg3 largepadding">', $adpost['type'] == 0 ? $adpost['content'] : eval($adpost['content']) ,'</div>
</div>';
}
}
[color=red][b]echo '</div>';]]>[/b][/color]
</add>
</operation>
</file>
After:
<div class="bordercolor">
<div class="clearfix windowbg3 largepadding">', $adpost['type'] == 0 ? $adpost['content'] : eval($adpost['content']) ,'</div>
</div>';
}
}
[color=green][b]]]>[/b][/color]
</add>
</operation>
</file>
Also, the mod found normal with the classic and default themes

Somebody can test it?
http://miguelcosta.com.ar/ad_mod_fix.zipSorry for my english again,
Miguel