diff --git a/install-new/classes/xmlLoader.php b/install-new/classes/xmlLoader.php
index 5430b2524..242201f6d 100644
--- a/install-new/classes/xmlLoader.php
+++ b/install-new/classes/xmlLoader.php
@@ -54,6 +54,10 @@ class InstallXmlLoader
 
 	protected $ids = array();
 
+	protected $primaries = array();
+
+	protected $delayed_inserts = array();
+
 	public function __construct()
 	{
 		$this->language = InstallLanguages::getInstance();
@@ -290,6 +294,8 @@ class InstallXmlLoader
 					$this->copyImages($entity, $identifier, (string)$xml->fields['image'], $data);
 			}
 		}
+
+		$this->flushDelayedInserts();
 	}
 
 	/**
@@ -373,6 +379,20 @@ class InstallXmlLoader
 		return $data;
 	}
 
+	public function flushDelayedInserts()
+	{
+		foreach ($this->delayed_inserts as $entity => $queries)
+		{
+			$type = 'INSERT IGNORE';
+			if ($entity == 'access')
+				$type = 'REPLACE';
+
+			if (!Db::getInstance()->autoExecute(_DB_PREFIX_.$entity, $queries, $type))
+				$this->setError($this->language->l('An SQL error occured for entity <i>%1$s</i>: <i>%2$s</i>', $entity, Db::getInstance()->getMsgError()));
+			unset($this->delayed_inserts[$entity]);
+		}
+	}
+
 	/**
 	 * Create a simple entity with all its data and lang data
 	 * If a methode createEntity$entity exists, use it. Else if $classname is given, use it. Else do a simple insert in database.
@@ -385,16 +405,15 @@ class InstallXmlLoader
 	 */
 	public function createEntity($entity, $identifier, $classname, array $data, array $data_lang = array())
 	{
+		$xml = $this->loadEntity($entity);
 		if (method_exists($this, 'createEntity'.Tools::toCamelCase($entity)))
 		{
 			// Create entity with custom method in current class
 			$method = 'createEntity'.Tools::toCamelCase($entity);
-			$entity_id = $this->$method($data, $data_lang);
+			$entity_id = $this->$method($identifier, $data, $data_lang);
 		}
 		else if ($classname)
 		{
-			$xml = $this->loadEntity($entity);
-
 			// Create entity with ObjectModel class
 			$object = new $classname();
 			$object->hydrate($data);
@@ -405,15 +424,22 @@ class InstallXmlLoader
 		}
 		else
 		{
-			// Create entity in database);
-			$execute_type = 'INSERT IGNORE';
-			if ($entity == 'access')
-				$execute_type = 'REPLACE';
+			// Generate primary key manually
+			$primary = '';
+			$entity_id = 0;
+			if (!$xml->fields['primary'])
+				$primary = 'id_'.$entity;
+			else if (strpos((string)$xml->fields['primary'], ',') === false)
+				$primary = (string)$xml->fields['primary'];
 
-			if (!Db::getInstance()->autoExecute(_DB_PREFIX_.$entity, array_map('pSQL', $data), $execute_type))
-				$this->setError($this->language->l('An SQL error occured for entity <i>%1$s</i>: <i>%2$s</i>', $entity, Db::getInstance()->getMsgError()));
-			$entity_id = Db::getInstance()->Insert_ID();
+			if ($primary)
+			{
+				$entity_id = $this->generatePrimary($entity, $primary);
+				$data[$primary] = $entity_id;
+			}
 
+			// Store INSERT queries in order to optimize install with grouped inserts
+			$this->delayed_inserts[$entity][] = array_map('pSQL', $data);
 			if ($data_lang)
 			{
 				$real_data_lang = array();
@@ -425,8 +451,7 @@ class InstallXmlLoader
 				{
 					$insert_data_lang['id_'.$entity] = $entity_id;
 					$insert_data_lang['id_lang'] = $id_lang;
-					if (!Db::getInstance()->autoExecute(_DB_PREFIX_.$entity.'_lang',  array_map('pSQL', $insert_data_lang), 'INSERT IGNORE'))
-						$this->setError($this->language->l('An SQL error occured for entity <i>%1$s</i>: <i>%2$s</i>', $entity, Db::getInstance()->getMsgError()));
+					$this->delayed_inserts[$entity.'_lang'][] = array_map('pSQL', $insert_data_lang);
 				}
 			}
 		}
@@ -434,11 +459,56 @@ class InstallXmlLoader
 		$this->storeId($entity, $identifier, $entity_id);
 	}
 
-	public function createEntityConfiguration(array $data, array $data_lang = array())
+	public function createEntityTab($identifier, array $data, array $data_lang)
 	{
-		if (!Configuration::get($data['name']))
-			Configuration::updateGlobalValue($data['name'], ($data_lang) ? $data_lang['value'] : $data['value']);
-		return Configuration::getIdByName($data['name']);
+		static $position = array();
+
+		$entity = 'tab';
+		$xml = $this->loadEntity($entity);
+
+		if (!isset($position[$data['id_parent']]))
+			$position[$data['id_parent']] = 0;
+		$data['position'] = $position[$data['id_parent']]++;
+
+		// Generate primary key manually
+		$primary = '';
+		$entity_id = 0;
+		if (!$xml->fields['primary'])
+			$primary = 'id_'.$entity;
+		else if (strpos((string)$xml->fields['primary'], ',') === false)
+			$primary = (string)$xml->fields['primary'];
+
+		if ($primary)
+		{
+			$entity_id = $this->generatePrimary($entity, $primary);
+			$data[$primary] = $entity_id;
+		}
+
+		// Store INSERT queries in order to optimize install with grouped inserts
+		$this->delayed_inserts[$entity][] = array_map('pSQL', $data);
+		if ($data_lang)
+		{
+			$real_data_lang = array();
+			foreach ($data_lang as $field => $list)
+				foreach ($list as $id_lang => $value)
+					$real_data_lang[$id_lang][$field] = $value;
+
+			foreach ($real_data_lang as $id_lang => $insert_data_lang)
+			{
+				$insert_data_lang['id_'.$entity] = $entity_id;
+				$insert_data_lang['id_lang'] = $id_lang;
+				$this->delayed_inserts[$entity.'_lang'][] = array_map('pSQL', $insert_data_lang);
+			}
+		}
+
+		$this->storeId($entity, $identifier, $entity_id);
+	}
+
+	public function generatePrimary($entity, $primary)
+	{
+		if (!isset($this->primaries[$entity]))
+			$this->primaries[$entity] = (int)Db::getInstance()->getValue('SELECT '.$primary.' FROM '._DB_PREFIX_.$entity.' ORDER BY '.$primary.' DESC');
+		return ++$this->primaries[$entity];
 	}
 
 	public function copyImages($entity, $identifier, $path, array $data, $extension = 'jpg')
diff --git a/install-new/data/xml/address_format.xml b/install-new/data/xml/address_format.xml
index 466bb5720..92fd69c14 100644
--- a/install-new/data/xml/address_format.xml
+++ b/install-new/data/xml/address_format.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <entity_address_format>
-  <fields primary="id_country" class="AddressFormat">
+  <fields primary="id_country">
     <field name="id_country" relation="country"/>
     <field name="format"/>
   </fields>
diff --git a/install-new/data/xml/configuration.xml b/install-new/data/xml/configuration.xml
index 15fba6fce..ca7720805 100644
--- a/install-new/data/xml/configuration.xml
+++ b/install-new/data/xml/configuration.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <entity_configuration>
-  <fields id="name" class="Configuration" null="1">
+  <fields id="name" null="1">
     <field name="name"/>
     <field name="value"/>
   </fields>
diff --git a/install-new/data/xml/country.xml b/install-new/data/xml/country.xml
index 2bb63d79d..6ae23d5c8 100644
--- a/install-new/data/xml/country.xml
+++ b/install-new/data/xml/country.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <entity_country>
-  <fields id="iso_code" class="Country">
+  <fields id="iso_code">
     <field name="id_zone" relation="zone"/>
     <field name="iso_code"/>
     <field name="call_prefix"/>
diff --git a/install-new/data/xml/hook.xml b/install-new/data/xml/hook.xml
index bcda45946..152f0b88f 100644
--- a/install-new/data/xml/hook.xml
+++ b/install-new/data/xml/hook.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <entity_hook>
-  <fields id="name" class="Hook">
+  <fields id="name">
     <field name="name"/>
     <field name="title"/>
     <field name="description"/>
diff --git a/install-new/data/xml/meta.xml b/install-new/data/xml/meta.xml
index 1afd028dc..4e9b6700a 100644
--- a/install-new/data/xml/meta.xml
+++ b/install-new/data/xml/meta.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <entity_meta>
-  <fields id="page" class="Meta">
+  <fields id="page">
     <field name="page"/>
   </fields>
   <entities>
diff --git a/install-new/data/xml/state.xml b/install-new/data/xml/state.xml
index 5f48d0706..ccb4f4bdb 100644
--- a/install-new/data/xml/state.xml
+++ b/install-new/data/xml/state.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <entity_state>
-  <fields id="iso_code" class="State">
+  <fields id="iso_code">
     <field name="id_country" relation="country"/>
     <field name="id_zone" relation="zone"/>
     <field name="name"/>
diff --git a/install-new/data/xml/tab.xml b/install-new/data/xml/tab.xml
index bc8973379..8b382c2db 100644
--- a/install-new/data/xml/tab.xml
+++ b/install-new/data/xml/tab.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <entity_tab>
-  <fields id="name" class="Tab" ordersql="a.id_parent, a.position" image="t">
+  <fields id="name" ordersql="a.id_parent, a.position" image="t">
     <field name="id_parent" relation="tab"/>
     <field name="class_name"/>
     <field name="active"/>
diff --git a/install-new/index.php b/install-new/index.php
index 9ac8d9c95..2f360200a 100644
--- a/install-new/index.php
+++ b/install-new/index.php
@@ -35,4 +35,4 @@ try
 catch (PrestashopInstallerException $e)
 {
 	$e->displayMessage();
-}
\ No newline at end of file
+}
diff --git a/install-new/init.php b/install-new/init.php
index 8f0691213..51f2491ff 100644
--- a/install-new/init.php
+++ b/install-new/init.php
@@ -53,6 +53,8 @@ require_once _PS_INSTALL_PATH_.'classes/sqlLoader.php';
 require_once _PS_INSTALL_PATH_.'classes/xmlLoader.php';
 require_once _PS_INSTALL_PATH_.'classes/simplexml.php';
 
+@set_time_limit(300);
+
 class InstallLog
 {
 	/**
@@ -68,8 +70,9 @@ class InstallLog
 	}
 
 	protected $fd;
-	protected $start_time = array();
+	protected $data = array();
 	protected $last_time;
+	protected $depth = 0;
 
 	public function __construct()
 	{
@@ -79,20 +82,28 @@ class InstallLog
 
 	public function write($id)
 	{
-		$str = "[$id]";
-		$str .= ' - [Time: '.round(microtime(true) - $this->last_time, 4).']';
-		if (isset($this->start_time[$id]))
-			$str .= ' - [Length: '.round(microtime(true) - $this->start_time[$id], 4).']';
-		fwrite($this->fd, "$str\n");
+		$str = str_pad("[$id]", 35, ' ');
+		if (isset($this->data[$id]['start']))
+			$str .= str_pad(round(microtime(true) - $this->data[$id]['start'], 4).'ms', 10, ' ');
+		$str .= str_pad(round(microtime(true) - $this->last_time, 4).'ms', 10, ' ');
+		$this->data[$id]['str'] = str_repeat("\t", $this->depth - 1)."$str\n";
+		$this->depth--;
 	}
 
 	public function start($id)
 	{
-		$this->start_time[$id] = microtime(true);
+		$this->data[$id] = array('start' => microtime(true));
+		$this->depth++;
 	}
 
 	public function __destruct()
 	{
+		foreach ($this->data as $k => $info)
+			if (!isset($info['str']))
+				$this->write($k);
+
+		foreach ($this->data as $info)
+			fwrite($this->fd, $info['str']);
 		fclose($this->fd);
 	}
 }
\ No newline at end of file
diff --git a/install-new/models/install.php b/install-new/models/install.php
index 79146a74a..c05c3293c 100644
--- a/install-new/models/install.php
+++ b/install-new/models/install.php
@@ -196,7 +196,7 @@ class InstallModelInstall extends InstallAbstractModel
 			}
 		}
 
-		// Copy language default images (we do this action after database in populated because we need image types informations)
+		// Copy language default images (we do this action after database in populated because we need image types information)
 		foreach ($languages as $iso)
 			$this->copyLanguageImages($iso);