Wardriving Ubuntu & /etc/resolv.conf

[Hans Poppe]

Hi, I recently found a pub/cafe near where I live where there is an
unsecured WiFi that I've been using for some time. In Norway, where I live,
this is not illegal. However a problem has arisen. Lately another neighbour
to the cafe has set up another WiFi base station which is overpowering the
one I used. The new one is also unsecured (ie no encryption, no ESSID), but
the DHCP server on the new router is set to renew leases every 13 seconds,
and at that time the /etc/resolv.conf is overwritten with a new file,
listing only the new routers IP address (10.0.0.1) as DNS. It doesn't relay
from my machine. So my question is how can I prevent the overwriting
of /etc/resolv.conf? I tried to edit it (as root), but if I cat the file a 
immedeatly after exiting vi, the file is changed, but a few seconds later
if I cat it again it is set back to what it was. I then tried to chown and
chmod the file in several ways, but it didn't work either. Is there a way
to work around this? How can I configure my laptop running Ubuntu with
2.6.8 kernel to find and report more than the most powerful (I think this
is what it's doing) and let me choose which to connect to? I'm using
KWiFimanager, but it only shows one network. The reason why I think there
is a new network is because the signal strength has increased from 35-40%
to 80-90% sitting at the same table in the cafe :-)
I suppose I need software, but what to choose on this platform?
Thanks for any ideas.
Hans