Ubuntu tweak cannot start in Ubuntu mini.iso install running only LXDE (no GNOME)

[Luther Goh Lu Feng]

elelfgoh@unity:~$ ubuntu-tweak
Gtk-Message: Failed to load module "canberra-gtk-module": libcanberra-gtk-module.so: cannot open shared object file: No such file or directory

The error message displayed in the window is:

Traceback (most recent call last):
  File "ubuntu-tweak.py", line 80, in <module>
    launcher = TweakLauncher()
  File "ubuntu-tweak.py", line 47, in __init__
    from mainwindow import MainWindow
  File "/usr/share/ubuntu-tweak/mainwindow.py", line 124, in <module>
    from autostart import AutoStart
  File "/usr/share/ubuntu-tweak/autostart.py", line 25, in <module>
    from xdg.DesktopEntry import DesktopEntry
ImportError: No module named xdg.DesktopEntry