Hi,
I have a C760 and a WCF12. Everything works fine, if I recall correctly the only thing I had to do was edit the wlan-ng.conf file and reboot (it should only be necessary to restart the PCMCIA services, but still better safe...). Just in case, this is the pertinent line from my wlan-ng.conf:
card "Linksys WCF12 11Mbps 802.11b WLAN Card (Prism 3)"
version "Linksys", "Wireless CompactFlash Card", "", ""
manfid 0x028a, 0x0673
bind "prism2_cs"
I believe the only line missing was the manfid line.
Hope this helps.