Filter Threads By Thread Prefix - MyBB 1.6 Only

[ZiNgA BuRgA]

You'll need to modify the query to do that.
Find in showthread.php:

Code:

WHERE t.fid='{$thread['fid']}' AND t.tid!='{$thread['tid']}' AND t.visible='1' AND t.closed NOT LIKE 'moved|%' AND MATCH (t.subject) AGAINST ('".$db->escape_string($thread['subject'])."') >= '{$mybb->settings['similarityrating']}'

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And stick a AND t.prefix=<something> type term in there.