A few newbie questions about networking (wired and wireless)

[Ottavio Caruso <ottavio2006-usenet2012%yahoo.com@localhost>]

I've finally managed to install the amd64 port onto a usb disk to use
with a Thinkpad X61.

When running the post-installation utility from the installer, I was
given the option to configure the network. The interfaces available
were wm0, iwn0 and fpiw0. So I selected the iwn0 (wireless) but the
installer complained that it couldn't find a carrier (odd, because the
router is a couple of metres away) and it timed out.
So I selected wm0 and it correctly found the network and was able to
install pkgin.

However now every time I boot the system it hangs a couple of minutes
trying to configure wm0 even when no cable is plugged in.

1) Is the above mentioned intended behaviour?

2) How can I tell the system not to spend time configuring the card if
no cable is plugged in, without blacklisting the card in rc.conf?

3) Is it theoretically possible to configure a wireless network using
wpa from the installer.

And the most urgent one:
4) I swap between home (wpa) and public library (open network)
wireless. Is there any kind of user friendly gui-based applet that can
help me switch between these networks?

On Linux I was using network manager and nm-applet. I understand they
are not available either as a binary package or in the ports. I
believe PC-BSD has a similar applet. Is it possible to install it on
Netbsd and if so, how?

Thanks

-- 
Ottavio