Ok, i installed this on my test board and got errors like everyone else did. So i did basically what Erwin said in one of his posts
In the Header area at the top look for this code you added--
</td></tr></table>
<table cellspacing="0" cellpadding="0" border="0" width="100%">
<tr><td>
It's right at the top. I changed the 100% too 80% and it sorted everything out perfectly. Baring in mind i have my Main Table and Content Table width set to 85%.
Basically change that % on the code until you find one that works for you