Well I re-did everything
but using the tar ball rather than rpms
->upgraded to 1.770
->extracted the firware in /lib/firmware
->make and make install of the driver
now a dmesg | grep w2200
gives me :
ipw2200_boot.fw load failed
unable to load firmware....
On the sourceforge page of the driver it says that it is due to a firmeware_class problem
I thus tried :
$ modprobe firmware_class
wich results in : FATAL: Module firmware_class not found....
What should I do ???