You would have to edit forumdisplay. Here is what you should change but I didn't test it and there may be a performance hit. You would use $thread[posts]
Code:
$threads=$DB_site->query("
SELECT $dotuserid $votequery 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
LEFT JOIN icon ON (icon.iconid = thread.iconid)
$dotjoin
WHERE $threadids
ORDER BY sticky DESC, $sortfield $sqlsortorder
");
to this:
Code:
$threads=$DB_site->query("
SELECT $dotuserid $votequery icon.title as icontitle,icon.iconpath,user.posts,
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
LEFT JOIN icon ON (icon.iconid = thread.iconid)
LEFT JOIN user ON (user.username=thread.lastposter)
$dotjoin
WHERE $threadids
ORDER BY sticky DESC, $sortfield $sqlsortorder
");