Okay, the Symbol Spectrum 24 ... works:
First, you have to follow the ZeeUser-instruction: Edit /etc/pcmcia/spectrum.conf.
Then, you can use the network-settings and install a lan(!), not wlan-card. The spectrum will immediately work (without encryption).
If you want to use encryption, you can insert the nessecary /sbin/iwconfig eth0 enc 0000-0000-0000... -command into the corresponding section of /etc/pcmcia/network.opts, between the {}-parantesis of the start_fn, before the return-statement and followed by a ";". Perhaps you want to add some more options to the iwconfig.
Good luck. :-)
PS: If the Z hangs and the screen disappears: just release the card and reinsert after some seconds. And try again.