I am having a similar problem. I am using a Linksys WMP54GS with a
2WIRE wireless modem. I have installed ndiswrapper and sucessfully installed the driver from the disk that came with the wireless card.
When I try to update the ESSID, either by GUI or CLI using the command <iwconfig wlan0 essid "myessid" > the essid option remains
at the "off/any" rather than updating. Has anyone found a solution? Is there a patch for the kernel that corrects a bug?