diff --git a/install-dev/controllers/http/database.php b/install-dev/controllers/http/database.php
index 5fdb969f9..86c3f8410 100644
--- a/install-dev/controllers/http/database.php
+++ b/install-dev/controllers/http/database.php
@@ -88,7 +88,9 @@ class InstallControllerHttpDatabase extends InstallControllerHttp
 			$this->session->database_password,
 			$this->session->database_prefix,
 			$this->session->database_engine,
-			$this->session->database_clear
+
+			// We do not want to validate table prefix if we are already in install process
+			($this->session->step == 'process') ? true : $this->session->database_clear
 		);
 
 		return count($this->errors) ? false : true;
diff --git a/install-dev/controllers/http/process.php b/install-dev/controllers/http/process.php
index 9e4050aab..0ef88946f 100644
--- a/install-dev/controllers/http/process.php
+++ b/install-dev/controllers/http/process.php
@@ -74,7 +74,9 @@ class InstallControllerHttpProcess extends InstallControllerHttp
 		if (file_exists(_PS_ROOT_DIR_.'/'.self::SETTINGS_FILE))
 			require_once _PS_ROOT_DIR_.'/'.self::SETTINGS_FILE;
 
-		if (Tools::getValue('installDatabase'))
+		if (Tools::getValue('generateSettingsFile'))
+			$this->processGenerateSettingsFile();
+		else if (Tools::getValue('installDatabase') && !empty($this->session->process_validated['generateSettingsFile']))
 			$this->processInstallDatabase();
 		else if (Tools::getValue('populateDatabase') && !empty($this->session->process_validated['installDatabase']))
 			$this->processPopulateDatabase();
@@ -95,22 +97,32 @@ class InstallControllerHttpProcess extends InstallControllerHttp
 	}
 
 	/**
-	 * PROCESS : installDatabase
-	 * Generate settings file and create database structure
+	 * PROCESS : generateSettingsFile
 	 */
-	public function processInstallDatabase()
+	public function processGenerateSettingsFile()
 	{
-		$success = $this->model_install->installDatabase(
+		$success = $this->model_install->generateSettingsFile(
 			$this->session->database_server,
 			$this->session->database_login,
 			$this->session->database_password,
 			$this->session->database_name,
 			$this->session->database_prefix,
-			$this->session->database_engine,
-			$this->session->database_clear
+			$this->session->database_engine
 		);
 
-		if (!$success || $this->model_install->getErrors())
+		if (!$success)
+			$this->ajaxJsonAnswer(false);
+		$this->session->process_validated['generateSettingsFile'] = true;
+		$this->ajaxJsonAnswer(true);
+	}
+
+	/**
+	 * PROCESS : installDatabase
+	 * Create database structure
+	 */
+	public function processInstallDatabase()
+	{
+		if (!$this->model_install->installDatabase($this->session->database_clear) || $this->model_install->getErrors())
 			$this->ajaxJsonAnswer(false, $this->model_install->getErrors());
 		$this->session->process_validated['installDatabase'] = true;
 		$this->ajaxJsonAnswer(true);
@@ -245,6 +257,7 @@ class InstallControllerHttpProcess extends InstallControllerHttp
 	public function display()
 	{
 		$this->process_steps = array();
+		$this->process_steps[] = array('key' => 'generateSettingsFile', 'lang' => $this->l('Create settings.inc file'));
 		$this->process_steps[] = array('key' => 'installDatabase', 'lang' => $this->l('Create database tables'));
 		$this->process_steps[] = array('key' => 'populateDatabase', 'lang' => $this->l('Populate database tables'));
 		$this->process_steps[] = array('key' => 'configureShop', 'lang' => $this->l('Configure shop informations'));
diff --git a/install-dev/models/install.php b/install-dev/models/install.php
index ce3c21000..e5f3f05ac 100644
--- a/install-dev/models/install.php
+++ b/install-dev/models/install.php
@@ -29,47 +29,6 @@ class InstallModelInstall extends InstallAbstractModel
 {
 	const SETTINGS_FILE = 'config/settings.inc.php';
 
-	/**
-	 * PROCESS : installDatabase
-	 * Generate settings file and create database structure
-	 */
-	public function installDatabase($database_server, $database_login, $database_password, $database_name, $database_prefix, $database_engine, $clear_database = false)
-	{
-		// Generate settings file
-		$this->generateSettingsFile($database_server, $database_login, $database_password, $database_name, $database_prefix, $database_engine);
-
-		// Clear database (only tables with same prefix)
-		require_once _PS_ROOT_DIR_.'/'.self::SETTINGS_FILE;
-		if ($clear_database)
-			$this->clearDatabase();
-
-		// Install database structure
-		$sql_loader = new InstallSqlLoader();
-		$sql_loader->setMetaData(array(
-			'PREFIX_' => _DB_PREFIX_,
-			'ENGINE_TYPE' => _MYSQL_ENGINE_,
-		));
-
-		try
-		{
-			$sql_loader->parse_file(_PS_INSTALL_DATA_PATH_.'db_structure.sql');
-		}
-		catch (PrestashopInstallerException $e)
-		{
-			$this->setError($this->language->l('Database structure file not found'));
-			return false;
-		}
-
-		if ($errors = $sql_loader->getErrors())
-		{
-			foreach ($errors as $error)
-				$this->setError($this->language->l('An SQL error occured: <i>%1$s</i>', $error['error']));
-			return false;
-		}
-
-		return true;
-	}
-
 	/**
 	 * Generate settings file
 	 */
@@ -124,6 +83,44 @@ class InstallModelInstall extends InstallAbstractModel
 		return true;
 	}
 
+	/**
+	 * PROCESS : installDatabase
+	 * Generate settings file and create database structure
+	 */
+	public function installDatabase($clear_database = false)
+	{
+		// Clear database (only tables with same prefix)
+		require_once _PS_ROOT_DIR_.'/'.self::SETTINGS_FILE;
+		if ($clear_database)
+			$this->clearDatabase();
+
+		// Install database structure
+		$sql_loader = new InstallSqlLoader();
+		$sql_loader->setMetaData(array(
+			'PREFIX_' => _DB_PREFIX_,
+			'ENGINE_TYPE' => _MYSQL_ENGINE_,
+		));
+
+		try
+		{
+			$sql_loader->parse_file(_PS_INSTALL_DATA_PATH_.'db_structure.sql');
+		}
+		catch (PrestashopInstallerException $e)
+		{
+			$this->setError($this->language->l('Database structure file not found'));
+			return false;
+		}
+
+		if ($errors = $sql_loader->getErrors())
+		{
+			foreach ($errors as $error)
+				$this->setError($this->language->l('An SQL error occured: <i>%1$s</i>', $error['error']));
+			return false;
+		}
+
+		return true;
+	}
+
 	/**
 	 * Clear database (only tables with same prefix)
 	 *