[Andreas]

OK

Replace the Code added in functions_showthread.php with

PHP Code:

if ($post['journal_id'])
{
    $show['journal'] = true;
    $journal['journal_id'] =& $post['journal_id'];
    $journal['journaldesc'] = fetch_trimmed_title($post['journaldesc'], 150);
}
else
{
    $show['journal'] = false;
} 


In showthread.php locate the $posts/$cacheposts Queries.
Add journals.journal_ad, journals.journaldesc to the List of selected Fields.
Add

PHP Code:

LEFT JOIN " . TABLE_PREFIX . "journals AS journals ON (journals.journalist_id=post.userid) 


to their Joins.

Done.

But as said: No guarantee that my assumption is right; can't test it as I don't have a vB 3.0.X Board with this Hack installed available at the moment to test it.
But from looking at the Code it seems so