[PyQt] new to Qt/PyQt.. question about popping up dialog boxes in series

[inhahe]

What is the best way to run a series of dialogs, each running after
the other quits, but maybe not running depending on how the user
responded to the previous one?

What I'm actually trying to do is this.. if there's an error reading
the configuration file, then pop up a dialog asking whether to run the
setup wizard.  If the user chooses not to, quit the app.  If the user
runs the setup wizard, run the app after it completes (unless the user
aborts).  If there's no error loading the config file, then run the
main app, unless the config file indicates that the setup wizard
hasn't been run yet, in which case run the setup wizard first..

Oh, I'm using Qt 4 and PyQt 4.