[Logician]

I guess you should modify this section in forumdisplay.php:

PHP Code:

$threads=$DB_site->query("
SELECT $dotuserid $votequery ".iif($foruminfo[allowicons],'icon.title as icontitle,icon.iconpath,','')."
    thread.threadid,thread.title,lastpost, forumid,pollid,open,replycount,postusername,postuserid,
    lastposter,thread.dateline,views,thread.iconid,notes,thread.visible,sticky,votetotal,attach
    FROM thread
    ".iif($foruminfo[allowicons],'LEFT JOIN icon ON (icon.iconid = thread.iconid)','')."
    $dotjoin
    WHERE $threadids
    ORDER BY sticky DESC, $sortfield $sqlsortorder
    "); 


As:

PHP Code:

$threads=$DB_site->query("
SELECT $dotuserid $votequery ".iif($foruminfo[allowicons],'icon.title as icontitle,icon.iconpath,','')."
    thread.threadid,thread.title,lastpost, forumid,pollid,open,replycount,postusername,postuserid,
    lastposter,thread.dateline,views,thread.iconid,notes,thread.visible,sticky,votetotal,attach,thread.YOURCUSTOMFIELD
    FROM thread
    ".iif($foruminfo[allowicons],'LEFT JOIN icon ON (icon.iconid = thread.iconid)','')."
    $dotjoin
    WHERE $threadids
    ORDER BY sticky DESC, $sortfield $sqlsortorder
    "); 


Then a few lines below right after:

PHP Code:

while ($thread=$DB_site->fetch_array($threads)) { // and $counter++<$perpage) { 


add

PHP Code:

$maker=$thread['YOURCUSTOMFIELD']; 


and use $maker in the relevant template..

Not tested, should work...