Addon to previous message:

fglrx shouldn't be part of the m-a line as it does not compile

build ipw3945 running:

cd /usr/src/modules/ipw3945-1.2.0
KSRC='/raid/Grml/kernel/linux-2.6.20-grml' KVERS='2.6.20-grml' debian/rules 
binary-modules