--- wp-config.php
+++ wp-config.php
@@ -86,5 +86,24 @@
 if ( !defined('ABSPATH') )
 	define('ABSPATH', dirname(__FILE__) . '/');
 
+
+/** Run 2 copies of WordPress from the same Database
+ *
+ * source: http://codex.wordpress.org/Running_a_Development_Copy_of_WordPress#Run_2_Copies_of_WordPress_from_the_same_Database
+ */
+function WP_LOCATION () {
+  $script_path = realpath(dirname($_SERVER['SCRIPT_FILENAME']));
+  $wp_base_path = realpath(dirname(__FILE__) . DIRECTORY_SEPARATOR);
+  $web_subfolder = substr( $script_path, strlen($wp_base_path));
+  $wp_path = $web_subfolder ? substr( dirname($_SERVER['SCRIPT_NAME']), 0, -strlen($web_subfolder) ) : dirname($_SERVER['SCRIPT_NAME']) ;
+  $retval = 'http' . ($_SERVER['HTTPS'] ? 's' : null) . '://' . $_SERVER['HTTP_HOST'] . $wp_path ;
+  return $retval;
+}
+$wpLocation = WP_LOCATION();
+define('WP_HOME',$wpLocation);
+define('WP_SITEURL',$wpLocation);
+define('WP_CONTENT_URL',$wpLocation."/wp-content");
+
+
 /** Sets up WordPress vars and included files. */