Look here in the file /var/lib/dpkg/info/pluto-boot-scripts.postinst
## Add shortcut to the desktop to get back to LinuxMCE orbiter
cat <<eol >/etc/skel/Desktop/LinuxMCE
[Desktop Entry]
Encoding=UTF-8
Version=8.10
Type=Application
Exec=/usr/pluto/bin/ActivateOrbiterFromKDE.sh
Path=/usr/pluto/bin
Name=Back To LinuxMCE Orbiter
Icon=gnome-panel-launcher
eol
Script should really detect whether the folder exists,
[ -d /etc/skel/Desktop/ ] || mkdir /etc/skel/Desktop/