joefitzgerald/packer-windows — pull request #2 by dylanmei (2013-09-19 14:10:11+00:00)
Title: VirtualBox builders install VBoxGuestAdditions

Packer uploads the corresponding version of the VBoxGuestAdditions but doesn't actually install them. Following along with the VMWare tools script, extract and install and clean up after the VBoxGuestAdditions as a provisioning script.

Verified this in 2012 with virtualbox and vmware builders.