hey all!!!! i think i got it to work!!!!
here are the steps:
# unpack archive V 0.11 beta 6
tar xzvf at76c503a.tar.gz

# cd into dir with Makefiile
cd at76c503a/at76c503a

# alternatively with V 0.10:
#tar xzvf at76c503-0.10.tar.gz
#cd at76c503a-0.10

# compile source
make

# become superuser
su

# copy /lib from readonly CD to read/write memory
cp -r /KNOPPIX/lib /ramdisk/libmem

# relink /lib to the copy
ln -s -fn /ramdisk/libmem /lib

# look for old drivers
locate atmel

# old drivers are listed in the *.list file
cat /var/lib/dpkg/info/atmeldriver.list
grep '\.o' /var/lib/dpkg/info/atmeldriver.list

# remove old drivers
rm `grep '\.o' /var/lib/dpkg/info/atmeldriver.list`

# finally: install the new drivers
make install


now plug in the wusb
# become root
su

# configure the adapter
iwconfig wlan0 essid 'homewlan'
iwconfig wlan0 channel 10
iwconfig wlan0 mode Managed
iwconfig wlan0 nick 'homewlan'
iwconfig wlan0 key XXXX-XXXX-XX restricted
iwconfig wlan0 rate 11M
iwconfig wlan0 rate auto

# display setting for check
iwconfig wlan0

# bring up the interface
ifconfig wlan0 up

# get a DHCP lease from the access point router
pump -i wlan0

# check the routing table
netstat -r

# output for me:
#Kernel IP routing table
#Destination Gateway Genmask Flags MSS Window irtt Iface
#192.168.1.0 * 255.255.255.0 U 0 0 0 wlan0
#default 192.168.1.1 0.0.0.0 UG 0 0 0 wlan0

# ping the access point router
ping -c 2 192.168.1.1

# ping a foreign host
ping -c 4 www.osgev.de

post here if this one works for you....ty