In this tutorial you will learn how to add AMD packages via Extension Modules, rather than having to edit surf.xml.
This tutorial assumes you have completed the Header Tutorials tutorials. In this section you had to add the tutorials package by editing surf.xml. As this is a system file it can only be done by administrators, and is therefore somewhat inconvenient for the deployment of third-party extensions. To get around this issue it is now possible (from 4.2.2 onwards) to add new packages via an extension module.