Sidebar on showthread page, please help.

[abud]

Hello,

I want to add sidebar on my forums like this http://camaroforums.com/forum/index.php (advertising column, on right side)

on forum, i got this code:

<table><tr>
<td width="80%">
CURRENT MAIN FORUMHOME table area HERE
</td>
<td width="20%">
your new right column
</td>
</tr>
</table>

Index page done and forumdisplay done. but i have a problem with showthread page problem.

what should i do on this? or there is other code or mods i could use for easier way?

our vbul is 3.81

Thank you.