I plan on adding this to the liveUSB that I have. I have been unsuccessful with CLI as I am not 100% sure that iwconfig can do WPA-PSK (using passphrase I believe). Other GUI tools in other distros have presented to me prompts for password and manual set up of IP addresses for the laptop in my LAN. It's an ipw2200 intel on a Thinkpad X41. Detected, yes, and I can assign essid, but entering the password gets tricky.
Since I am not able to go online, I choose to add the app at the end of my data on the FAT32 liveUSB that I use to boot sabayon.


