unattended update-manager

[Pierre Frenkiel]

I ran update-manager to  upgrade from Feisty to Gutsy, in January, and
I had to stay in front of my computer for more than 3 hours, just to
answer 8 to 10 questions about keeping config files or installing the new ones.
Is there a way avoid that (for example, by setting a default answer)?
I think this should be available via a update-manager option.

Pierre