Add some more info about contributing to package list

index.html

@@ -121,7 +121,10 @@
 
         <h3>How can I help?</h3>
         <p>
-          If you have a compatibile (i686) Chromebook, you can fork my Github repo and add some new packages. You should know how to create them by looking at some existing ones - they are really simple Ruby files.
+          If you have a compatibile (i686) Chromebook, you can fork my Github repo and add some new packages to its <code>packages</code> directory if you managed to build them from source successfully on your device. Package recipes are simple Ruby files - here is an example:
+        </p>
+        <p>
+          <script src="https://gist.github.com/skycocker/6747775.js"></script>
         </p>
       </div>