Experience ? No.
The instructions look pretty simple. If a little fuzzy.
1) Don't despair if the 418n "disappears". It's either at
192.168.1.1 or at 192.168.1.2. When you change modes,
the docs suggest the address will change after the
418n does a restart. Just change the address in your
browser and try again.
2) It seems to be claiming DHCP is disabled. If so, you'd
enter the WinXP networking thing, change from "Automatic"
for IP address, to manual, then enter something in what
you assume is the same subnet. Perhaps 192.168.1.3
would be good enough. I'm surprised DHCP from the
apartment router is not visible. Maybe they don't allow
that, to prevent you from getting "trapped on a
different subnet" or something.
3) You don't have to worry about automatic DNS setting, as
you're already using an opendns address for that. Your
control panel is likely already in manual mode for that.
(Or else your 418n was in router mode, and had the DNS
set manually to the OpenDNS address.)
This should be simple enough, it'll take "half a dozen
experiments, tops"
The reset button on a router, is your friend. If you really
foul things up, follow the reset procedure in the manual.
Some routers make this into a peculiar ceremony, with
precise timing, like "once you see the red light, continue
to press the RESET button for ten seconds". That sort of thing.
There should be a section somewhere in the manual, covering reset.
I've had to use reset a couple of times on my ADSL modem/router,
until I was satisfied with the bridged mode I put it in. It sits
on a different subnet now, so I can't access it from here. I have
to "re-cable" if I want to talk to it.
HTH,
Paul