[vbplusme]

In your header template:

<table border="0" width="850" cellpadding="0" cellspacing="0" align="center">
<tr>
	<td align="left"><a href="index.php?"><img src="/forum/images/banner.jpg" border="0" alt="Skill In Peace" /></a></td>

	<td align="right" id="header_right_cell">
		&nbsp;
	</td>
</tr>
</table>

I think this, "<td align="left">" is the problem. If you change the left to center, it will probably align correct, though your reference site have removed the table construction completely but I think that isn't an issue. Change the alignment first if that doesn't work, you can convert the table to a <div> structure to fix it.