How do I get the default Network Manager plus dnsmasq-base setup back again?

[Chris Green]

Further information on this problem...

I have *another* system here with a newly installed Ubuntu 12.10 on it
and that *hasn't* got Network Manager's dnsmasq running on it.  Like my
desktop system where dnsmasq isn't running it's a 64-bit system.

The system where dnsmasq is running is a 32-bit system.  I wonder if
there's something in that?

-- 
Chris Green