Getting wireless to work on public wireless network

this may not be the place to ask this and if not kindly point me to the appropiate place and I will ask there.

I have my HP N5150 with a Belkin 802.11g wireless card WORKING on my home network using hotplug.d and wireless.opts. Where it gets it's essid, encyption, etc parameters.

Now, I go to my local library and wish to use their open wireless network. There params are
mode: managed
encyption: off
essid: JCPLWireless

I fire up and of course I don't connect because I am using my home parmeters. Running 'iwlist wlan0 scanning' reveals the JCPLWireless network as advertised. Ok, I enter:
iwconfig wlan0 mode managed
iwconfig wlan0 enc off
iwconfig wlan0 essid JCPLWireless

But then running 'iwconfig wlan0' it lists 'ESSID=""'. All other params are set to the new values, mode managed and enc off.

So, what do I need to do to get connected to a public wireless network WITHOUT having to change wireless.opts every time.

tj

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