[kh99]

Are you creating a "Custom HTML/PHP" forum block? You can try this: Go to the style manager and copy the code of the "block_html" template, then create a new template and paste the code and surround it with an if, like this:

<vb:if condition="$GLOBALS['forumid'] == X">

// code from block_html goes here

</vb:if>

(of course you'll replace X with your forumid).

Then at the bottom of forum block configuration page there's a "Template to Use" field. You can put the name of your new template there.