open "qa-db-selects.php" go to line 1254.
line 1254: 'columns' => array('^users.userid' , 'handle', 'points', 'flags', '^users.email', 'avatarblobid', 'avatarwidth',
add this: '^users.level',
new 1254 line: 'columns' => array('^users.userid', '^users.level', 'handle', 'points', 'flags', '^users.email', 'avatarblobid', 'avatarwidth',
--------------------
ok. now:
open "qa-page-users.php" and find "foreach ($users as $userid => $user)"
press enter..
add this: if($user['level']!=120){
find: ");}"
press enter..
add this: }
good luck.