[
{ type: install
  message: <<EOM
In order to launch your session. Copy 'xprofile' into your home directory:
  cp %%EXAMPLESDIR%%/xprofile ~/.xprofile

Create or edit /var/db/AccountsService/users/YOURLOGIN file:
  [User]
  Language=fr_FR.UTF-8 # e.g. for French users
  Session=gnome-classic-xorg
  SystemAccount=false

Replace YOURLOGIN by your login.

Currently only 'gnome-classic-xorg' is supported, and tested.
EOM
}
]