[cgmckeever]

If you add this code (in all spots cron and product xml) right after text_subject is defined, the EmailIntegration script will handle the custom prefixes _and_ use a default one if none is found - it seemed to already take into account the original prefixing anyhow [\$foruminfo[title_clean]-t-\$threadinfo[threadid]]:

// prefix code - cgmckeever

// use default
if (strlen($threadinfo[threadprefix]) == 0){
  $prefixes = explode("\r\n", trim($foruminfo['threadprefix']));
  $threadinfo[threadprefix] = $prefixes[0];
}
							
// wrap the prefix
if (strlen($threadinfo[threadprefix]) != 0){
  $threadinfo[threadprefix] = str_replace('{1}',$threadinfo[threadprefix],$vbulletin->options['prefixmarkupalt']);
  $threadinfo[threadprefix] = str_replace(' ',' ',$threadinfo[threadprefix]);
  // get rid of built in prefix
  $text_subject = trim(str_replace("[\$foruminfo[title_clean]-t-\$threadinfo[threadid]]",'',$text_subject));
  $text_subject = trim("\$threadinfo[threadprefix] " . $text_subject);
}

// end prefix code - cgmckeever