GNOME theme Where is ...? How to ...?

[Ralf]

Maverick:

What file(s) to restore, to get back a lost custom GNOME theme?

I need to restore the settings for my Maverick's "Appearance
Preferences". When I saved the "Custom" theme, something went wrong, now
the theme is lost. I do have a backup of the complete OS. I need to know
which files I have to restore. This happened when I was comparing
something with the settings for Natty.

Natty:

How can I switch the windows minimize, unmaximize and close buttons from
the right to the left side?

-- Ralf