How do I use Expansion Files?

Ashley How do I use Expansion Files for GPlay in C2 and/or Intel XDK?

MaorKeshet Does anyone know? Such as in what way to edit the intelxdk.config.additions.xml file in order to tell it that files meant to be in a certain directory (such as the folder 'www' or 'images' or 'media') can be found, instead, in this other APK package?