Here is the content of the file named xfcegui_module.txt use to build Impilo 11.04.
# # Modules for minimal GUI install # xfce4 xfce4-goodies gdm tango-icon-theme # # Modules for printing support # cups cups-driver-gutenprint foomatic-filters ghostscript-cups cups-pdf foomatic-db system-config-printer-gnome