Well, Prism54.org says that there has been sucsess with this card
Prism54.org
using thier driver, which is included in the 2.6.5 kernel, under:
Device Drivers---->
Networking support---->
Wireless LAN---->
Intersil Prism GT/Duette/Indigo PCI/Cardbus
(To recompile your kernel, download the 2.6.5 source from
www.kernel.org, put it in /usr/src as /usr/src/linux-2.6.5, type 'ln -s /usr/src/linux-2.6.5 /usr/src/linux'. Then cd into /usr/src/linux, type 'make xconfig' or 'make menuconfig'if you're on the command line, reconfigure, and then type make bzImage, then make modules, then make modues_install. New kernel is in /usr/src/linux/arch/i386/boot/bzImage, assuming you're on an x86 machine. Replace your current kernel with it. It's probably /boot/vmlinuz or /vmlinuz. Keep a backup as vmlinuz.old. type 'lilo' if you're using lilo and not grub or other, and you're good to go.)
Also, make sure you have the other kernel things it needs, like /sys and the firmware.
Other Kernel Requirements
Once you are past this point, make sure you have the 'iwconfig' command, and got the firmware from
here
Read thier readme to finish up. If this doesn't work, you can always get ndiswrapper and use your windows drivers
