Centering Logo - v3.8.x

[Fulla]

I did alot of searching for this one, could only find articles & guides on older versions of vb.
Basically I just simply want to center my logo, here's a screenshot to further clarify:


Been trying to alter the code in:
- Admin Control Panel > Styles & Templates > Style Manager > Edit templates > right_column_edit_templates

I experimented a bit with all the instructions, changing all 'left' to 'center', but didn't accomplish or change anything. I even tried removing ' ' which some recommended.
My site is www.GamingCraft.net where you can see, here is the code:

<!-- logo -->
<a name="top"></a>
<table border="0" width="$stylevar[outertablewidth]" style="background: url($stylevar[imgdir_misc]/header_repeat.gif) repeat-x top left" cellpadding="0" cellspacing="0" align="center">
<tr>
    <td width="100%" height="27" colspan="2" valign="top"><img src="$stylevar[imgdir_misc]/header_repeat.gif" border="0" alt="" /></td>
</tr>

<table border="0" width="$stylevar[outertablewidth]" style="background: url($stylevar[imgdir_misc]/dark_vb_bg.gif) repeat-x top left" cellpadding="0" cellspacing="0" align="center">
       <tr>
           <td align="$stylevar[left]"><a href="$vboptions[forumhome].php$session[sessionurl_q]"><img src="$stylevar[titleimage]" border="0" alt="$vboptions[bbtitle]" /></a></td>
           <td align="$stylevar[right]" id="header_right_cell"><if condition="$ad_location['ad_header_logo']">$ad_location[ad_header_logo]<else />&nbsp;</if></td>
       </tr>
</table>
<!-- /logo -->

<!-- content table -->
$spacer_open

$_phpinclude_output
$ad_location[ad_header_end]

Looking for assistance on what I need to change in code to center logo. Thank you.