I can add a dialog to the normal install sequence with Radio buttons that can be used to control custom install behavior. However when I go to the Administrative install sequence, the radio button dialogs (along with a number of other dialogs that take user input) aren't available.
Is there a way to force the radio button dialog to be available? If not, why isn't it, and what can I do when I need the user doing the install to pick between 2 configuration options.