add info about symlink to README

README.md

@@ -6,7 +6,11 @@ It uses the Zurb Foundation (http://foundation.zurb.com) CSS framework.
 
 ## Installation
 
-Clone this repository to your `skins` directory and add the following line to your `LocalSettings.php` file.
+Clone this repository to your `skins` directory and create a symlink to the main skin file.
+
+    ln -s Foreground/foreground.php Foreground.php
+
+Then add the following line to your `LocalSettings.php` file.
 
     require_once($IP.'/skins/Foreground/foreground.php');