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In showthread.php, look for the following:

if (!($forumperms & CANVIEWOTHERS) AND ($thread['postuserid'] != $bbuserinfo['userid'] OR $bbuserinfo['userid'] == 0))
{
	print_no_permission();
}

Below this, paste the following:

###DENY NOT LOGGED IN (USER 0) AND USERS AWAITING EMAIL CONFIRMATION (GROUP 3)###
if($bbuserinfo['userid']==0||$bbuserinfo['usergroupid']==3) print_no_permission();

[Princeton]

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[Weapon-x]

Were may ARCHIVE.PHP be located at? And what do you add and where?