How to set wireless settings for 2 different locales (FC3 Test 2)

[Amitabha Roy]

Hi:

I want to set up  FC3 T2 to automatically connect to available wireless 
networks in two different locations, one at home and at office.

At office, the network has an unadvertised ssid (call it "X"). At home, 
there is also a wireless network with an unadvertised ssid of "Y".
Since the SSID is not broadcast, scans for available networks will not 
bring them up. None of these two networks have encryption.
Both of these will use network device eth1, which is an integrated 
wireless card on a toshiba laptop running latest kernel 2.6.8-1.541

Problem 1)  At office, when the network X is joined via iwconfig, the 
name of the machine changes and the display does not work. I need
to restart the X server and log back in. I would want to avoid that

Problem 2) At home, there are other wireless networks (neighbours) which 
are connected to (these obviously broadcast their ssid).
So I have to manually do iwconfig eth1 essid Y.  Again the problem,   
with the hostname.

So how do I do this ? I want the machine to figure out whether X or Y is 
available on its own (whether I am at home or at work)
without me telling it and I want any hostname changes not to mess up 
display.   If in the process it comes across other networks,
it should just ignore them.  If I need to connect to them, I can do 
*that* manually.

Thanks!

Amitabha