I tried to open a dialog like David Planella describs here (and quickly help add): Open Custom Dialog Windows (PyGTK + Quickly)
But this don't works for me. I always get the same Error-Message if I open the creadted Dialog:
AttributeError: 'module' object has no attribute 'NewDialogNameDialog'
(Note: My Dialog-Name is replaced with "NewDialogNameDialog" to be more general.) I tried to test a tutorial for the Ubuntu app showdown to learn how to use quickly and python.
I can also add the whole source-code if you wish.