You'll need to grab the prefixid in the query for the thread. Then you may use
something like this code to create the prefix (it's an example! Modify it for your own needs). If you need further help,
you will have to ask in the modification thread since they will know the correct place to add the code and how to add to the query.
PHP Code:
if ($variable['prefixid'])
{
$variable['prefix_plain_html'] = htmlspecialchars_uni($vbphrase["prefix_$variable[prefixid]_title_plain"]);
$variable['prefix_rich'] = $vbphrase["prefix_$variable[prefixid]_title_rich"];
}
else
{
$variable['prefix_plain_html'] = '';
$variable['prefix_rich'] = '';
}