Ok hitmanuk32, you'll need to modify three templates to accomplish what you seek.
In template $phpinclude_start add the following at either the very beginning or the very end.
$forums_with_ads = array(
'1',
'4'
);
/* Put the forums #'s of the forums that you
want the ads to appear in, seperated by comma's,
one at a time. You don't need to put a comma after
the last entry. The example above is forum #1 and
#4. */
if (in_array($foruminfo['forumid'], $forums_with_ads))
{
$show_ads = true;
$outertable = $stylevar['outertablewidth'];
$stylevar[outertablewidth] = X;
$stylevar[outerdivwidth] = 'Xpx';
// X is the width of your forum minus the width of your ad.
}
else
{
$show_ads = false;
}
In your header add the following immediately before "<!-- content table -->
"
<!-- /logo -->
<if condition="$show_ads">
<table width="$outertable" border="0" cellpadding="$stylevar[cellpadding]" cellspacing="0" align="center">
<tr>
<td valign="top">
</if>
And in the footer add the following immediately after <!-- /content table -->
.
<if condition="$show_ads">
</td>
<td width="150" valign="top">
YOUR AD CODE GOES HERE
</td>
</tr>
</table>
</if>