I'm not sure what the default SSID should be in Knoppx, I know if they use "any" then many more wireless cards would work out-of-the-box, but to answer your question about setting the SSID manually, you can try ejecting your card and re-inserting it after you've made the change to wlan-ng.opts, hopefully the PCMCIA hotplug manager will reload the driver for it, now using the correct settings.