diff --git a/inc/config.php b/inc/config.php
index 84222009..897c8a42 100644
--- a/inc/config.php
+++ b/inc/config.php
@@ -1162,18 +1162,28 @@
  * ====================
  */
 
-	// Probably best not to change these:
-	if (!defined('JANITOR')) {
-		define('JANITOR',	0,	true);
-		define('MOD',		1,	true);
-		define('ADMIN',		2,	true);
-		define('DISABLED',	3,	true);
-	}
+	// Probably best not to change this unless you are smart enough to figure out what you're doing. If you
+	// decide to change it, remember that it is impossible to redefinite/overwrite groups; you may only add
+	// new ones.
+	$config['mod']['groups'] = array(
+		10	=> 'Janitor',
+		20	=> 'Mod',
+		30	=> 'Admin',
+		// 98	=> 'God',
+		99	=> 'Disabled'
+	);
+
+	// If you add stuff to the above, you'll need to call this function immediately after.
+	define_groups();
+
+	// Example: Adding a new permissions group.
+	// $config['mod']['groups'][0] = 'NearlyPowerless';
+	// define_groups();
 
 	// Capcode permissions.
 	$config['mod']['capcode'] = array(
 	//	JANITOR		=> array('Janitor'),
-		MOD			=> array('Mod'),
+		MOD		=> array('Mod'),
 		ADMIN		=> true
 	);
 
@@ -1312,18 +1322,14 @@
 	$config['mod']['edit_config'] = ADMIN;
 
 	// Config editor permissions
-	$config['mod']['config'] = array(
-		JANITOR => false,
-		MOD => false,
-		ADMIN => false,
-		DISABLED => false,
-	);
+	$config['mod']['config'] = array();
 
 	// Disable the following configuration variables from being changed via ?/config. The following default
 	// banned variables are considered somewhat dangerous.
 	$config['mod']['config'][DISABLED] = array(
 		'mod>config',
 		'mod>config_editor_php',
+		'mod>groups',
 		'convert_args',
 		'db>password',
 	);
diff --git a/inc/functions.php b/inc/functions.php
index 819a935b..e5e33449 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -265,6 +265,15 @@ function verbose_error_handler($errno, $errstr, $errfile, $errline) {
 	));
 }
 
+function define_groups() {
+	global $config;
+
+	foreach ($config['mod']['groups'] as $group_value => $group_name)
+		defined($group_name) or define($group_name, $group_value, true);
+	
+	ksort($config['mod']['groups']);
+}
+
 function create_antibot($board, $thread = null) {
 	require_once dirname(__FILE__) . '/anti-bot.php';
 
diff --git a/inc/mod/config-editor.php b/inc/mod/config-editor.php
index 3f15ebe5..4493fd2b 100644
--- a/inc/mod/config-editor.php
+++ b/inc/mod/config-editor.php
@@ -3,7 +3,7 @@
 function permission_to_edit_config_var($varname) {
 	global $config, $mod;
 
-	if (is_array($config['mod']['config'][DISABLED])) {
+	if (isset($config['mod']['config'][DISABLED])) {
 		foreach ($config['mod']['config'][DISABLED] as $disabled_var_name) {
 			$disabled_var_name = explode('>', $disabled_var_name);
 			if (count($disabled_var_name) == 1)
@@ -14,10 +14,11 @@ function permission_to_edit_config_var($varname) {
 	}
 	
 	$allow_only = false;
-	// for ($perm = (int)$mod['type']; $perm >= JANITOR; $perm --) {
-	for ($perm = JANITOR; $perm <= (int)$mod['type']; $perm ++) {
+	foreach ($config['mod']['groups'] as $perm => $perm_name) {
+		if ($perm > $mod['type'])
+			break;
 		$allow_only = false;
-		if (is_array($config['mod']['config'][$perm])) {
+		if (isset($config['mod']['config'][$perm]) && is_array($config['mod']['config'][$perm])) {
 			foreach ($config['mod']['config'][$perm] as $perm_var_name) {
 				if ($perm_var_name == '!') {
 					$allow_only = true;
@@ -92,7 +93,7 @@ function config_vars() {
 				continue; // This is just an alias.
 			if (!preg_match('/^array|\[\]|function/', $var['default']) && !preg_match('/^Example: /', trim(implode(' ', $var['comment'])))) {
 				$syntax_error = true;
-				$temp = eval('$syntax_error = false;return ' . $var['default'] . ';');
+				$temp = eval('$syntax_error = false;return @' . $var['default'] . ';');
 				if ($syntax_error && $temp === false) {
 					error('Error parsing config.php (line ' . $line_no . ')!', null, $var);
 				} elseif (!isset($temp)) {
diff --git a/inc/mod/pages.php b/inc/mod/pages.php
index 5e45cdae..af8f7466 100644
--- a/inc/mod/pages.php
+++ b/inc/mod/pages.php
@@ -1674,11 +1674,39 @@ function mod_user_promote($uid, $action) {
 	if (!hasPermission($config['mod']['promoteusers']))
 		error($config['error']['noaccess']);
 	
-	$query = prepare("UPDATE ``mods`` SET `type` = `type` " . ($action == 'promote' ? "+1 WHERE `type` < " . (int)ADMIN : "-1 WHERE `type` > " . (int)JANITOR) . " AND `id` = :id");
+	$query = prepare("SELECT `type`, `username` FROM ``mods`` WHERE `id` = :id");
 	$query->bindValue(':id', $uid);
 	$query->execute() or error(db_error($query));
 	
-	modLog(($action == 'promote' ? 'Promoted' : 'Demoted') . " user #{$uid}");
+	if (!$mod = $query->fetch(PDO::FETCH_ASSOC))
+		error($config['error']['404']);
+	
+	$new_group = false;
+	
+	$groups = $config['mod']['groups'];
+	if ($action == 'demote')
+		$groups = array_reverse($groups, true);
+	
+	foreach ($groups as $group_value => $group_name) {
+		if ($action == 'promote' && $group_value > $mod['type']) {
+			$new_group = $group_value;
+			break;
+		} elseif ($action == 'demote' && $group_value < $mod['type']) {
+			$new_group = $group_value;
+			break;
+		}
+	}
+	
+	if ($new_group === false || $new_group == DISABLED)
+		error(_('Impossible to promote/demote user.'));
+	
+	$query = prepare("UPDATE ``mods`` SET `type` = :group_value WHERE `id` = :id");
+	$query->bindValue(':id', $uid);
+	$query->bindValue(':group_value', $new_group);
+	$query->execute() or error(db_error($query));
+	
+	modLog(($action == 'promote' ? 'Promoted' : 'Demoted') . ' user "' .
+		utf8tohtml($mod['username']) . '" to ' . $config['mod']['groups'][$new_group]);
 	
 	header('Location: ?/users', true, $config['redirect_http']);
 }
@@ -2069,14 +2097,8 @@ function mod_config($board_config = false) {
 				
 				
 				$config_append .= ' = ';
-				if (@$var['permissions'] && in_array($value, array(JANITOR, MOD, ADMIN, DISABLED))) {
-					$perm_array = array(
-						JANITOR => 'JANITOR',
-						MOD => 'MOD',
-						ADMIN => 'ADMIN',
-						DISABLED => 'DISABLED'
-					);
-					$config_append .= $perm_array[$value];
+				if (@$var['permissions'] && isset($config['mod']['groups'][$value])) {
+					$config_append .= $config['mod']['groups'][$value];
 				} else {
 					$config_append .= var_export($value, true);
 				}
diff --git a/install.php b/install.php
index 45244b90..639a90c9 100644
--- a/install.php
+++ b/install.php
@@ -1,7 +1,7 @@
 <?php
 
 // Installation/upgrade file	
-define('VERSION', 'v0.9.6-dev-19');
+define('VERSION', 'v0.9.6-dev-20');
 
 require 'inc/functions.php';
 
@@ -407,6 +407,11 @@ if (file_exists($config['has_installed'])) {
 				  KEY `filehash` (`filehash`),
 				  KEY `time` (`time`)
 				) ENGINE=MyISAM DEFAULT CHARSET=ascii COLLATE=ascii_bin AUTO_INCREMENT=1 ;") or error(db_error());
+		case 'v0.9.6-dev-19':
+			query("UPDATE ``mods`` SET `type` = 10 WHERE `type` = 0") or error(db_error());
+			query("UPDATE ``mods`` SET `type` = 20 WHERE `type` = 1") or error(db_error());
+			query("UPDATE ``mods`` SET `type` = 30 WHERE `type` = 2") or error(db_error());
+			query("ALTER TABLE ``mods`` CHANGE `type`  `type` smallint(1) NOT NULL") or error(db_error());
 		case false:
 			// Update version number
 			file_write($config['has_installed'], VERSION);
diff --git a/install.sql b/install.sql
index 25c0a0f1..1e7a5011 100644
--- a/install.sql
+++ b/install.sql
@@ -131,7 +131,7 @@ CREATE TABLE IF NOT EXISTS `mods` (
   `username` varchar(30) NOT NULL,
   `password` char(64) CHARACTER SET ascii NOT NULL COMMENT 'SHA256',
   `salt` char(32) CHARACTER SET ascii NOT NULL,
-  `type` smallint(1) NOT NULL COMMENT '0: janitor, 1: mod, 2: admin',
+  `type` smallint(2) NOT NULL,
   `boards` text CHARACTER SET utf8 NOT NULL,
   PRIMARY KEY (`id`),
   UNIQUE KEY `id` (`id`,`username`)
@@ -142,7 +142,7 @@ CREATE TABLE IF NOT EXISTS `mods` (
 --
 
 INSERT INTO `mods` VALUES
-(1, 'admin', 'cedad442efeef7112fed0f50b011b2b9bf83f6898082f995f69dd7865ca19fb7', '4a44c6c55df862ae901b413feecb0d49', 2, '*');
+(1, 'admin', 'cedad442efeef7112fed0f50b011b2b9bf83f6898082f995f69dd7865ca19fb7', '4a44c6c55df862ae901b413feecb0d49', 20, '*');
 
 -- --------------------------------------------------------
 
diff --git a/templates/mod/config-editor.html b/templates/mod/config-editor.html
index a43f8cf7..4f4cba93 100644
--- a/templates/mod/config-editor.html
+++ b/templates/mod/config-editor.html
@@ -42,10 +42,11 @@
 						<input name="{{ name }}" type="text" value="{{ var.value|e }}">
 					{% elseif var.permissions %}
 						<select name="{{ name }}">
-							<option value="{{ constant('JANITOR') }}"{% if var.value == constant('JANITOR')%} selected{% endif %}>JANITOR</option>
-							<option value="{{ constant('MOD') }}"{% if var.value == constant('MOD')%} selected{% endif %}>MOD</option>
-							<option value="{{ constant('ADMIN') }}"{% if var.value == constant('ADMIN')%} selected{% endif %}>ADMIN</option>
-							<option value="{{ constant('DISABLED') }}"{% if var.value == constant('DISABLED')%} selected{% endif %}>DISABLED</option>
+							{% for group_value, group_name in config.mod.groups %}
+								<option value="{{ group_value }}"{% if var.value == group_value %} selected{% endif %}>
+									{{ group_name }}
+								</option>
+							{% endfor %}
 						</select>
 					{% elseif var.type == 'integer' %}
 						<input name="{{ name }}" type="number" value="{{ var.value|e }}">
diff --git a/templates/mod/user.html b/templates/mod/user.html
index 1bb297af..89240824 100644
--- a/templates/mod/user.html
+++ b/templates/mod/user.html
@@ -28,21 +28,15 @@
 		</tr>
 		{% if new %}
 			<tr>
-				<th>{% trans 'Class' %}</th>
+				<th>{% trans 'Group' %}</th>
 				<td>
 					<ul style="padding:5px 8px;list-style:none">
-						<li>
-							<input type="radio" name="type" id="janitor" value="{{ constant('JANITOR') }}"> 
-							<label for="janitor">{% trans 'Janitor' %}</label>
-						</li>
-						<li>
-							<input type="radio" name="type" id="mod" value="{{ constant('MOD') }}" checked> 
-							<label for="mod">{% trans 'Mod' %}</label>
-						</li>
-						<li>
-							<input type="radio" name="type" id="admin" value="{{ constant('Admin') }}"> 
-							<label for="admin">{% trans 'Admin' %}</label>
-						</li>
+						{% for group_value, group_name in config.mod.groups if group_name != 'Disabled' %}
+							<li>
+								<input type="radio" name="type" id="group_{{ group_name }}" value="{{ group_value }}"> 
+								<label for="group_{{ group_name }}">{% trans group_name %}</label>
+							</li>
+						{% endfor %}
 					</ul>
 				</td>
 			</tr>
diff --git a/templates/mod/users.html b/templates/mod/users.html
index fbd43b32..984c48e1 100644
--- a/templates/mod/users.html
+++ b/templates/mod/users.html
@@ -15,9 +15,10 @@
 			<td><small>{{ user.id }}</small></td>
 			<td>{{ user.username|e }}</td>
 			<td>
-				{% if user.type == constant('JANITOR') %}{% trans 'Janitor' %}
-				{% elseif user.type == constant('MOD') %}{% trans 'Mod' %}
-				{% elseif user.type == constant('ADMIN') %}{% trans 'Admin' %}
+				{% if config.mod.groups[user.type] %}
+					{{ config.mod.groups[user.type] }}
+				{% else %}
+					<em>{% trans 'Unknown' %}</em> ({{ user.type }})
 				{% endif %}
 			</td>
 			<td>
@@ -46,10 +47,10 @@
 				</td>
 			{% endif %}
 			<td>
-				{% if mod|hasPermission(config.mod.promoteusers) and user.type < constant('ADMIN') %}
+				{% if mod|hasPermission(config.mod.promoteusers) and user.type < constant(config.mod.groups[0:-1]|last) %}
 					<a style="float:left;text-decoration:none" href="?/users/{{ user.id }}/promote" title="{% trans 'Promote' %}">&#9650;</a> 
 				{% endif %}
-				{% if mod|hasPermission(config.mod.promoteusers) and user.type > constant('JANITOR') %}
+				{% if mod|hasPermission(config.mod.promoteusers) and user.type > constant(config.mod.groups|first) %}
 					<a style="float:left;text-decoration:none" href="?/users/{{ user.id }}/demote" title="{% trans 'Demote' %}">&#9660;</a> 
 				{% endif %}
 				{% if mod|hasPermission(config.mod.modlog) %}