If your install faild: rm /usr/share/bcm43xx-fwcutter/install_bcm43xx_firmware.sh Downalod the file I attached (its taken from lenny package. Its exactly the what it should be)
cp install_bcm43xx_firmware.sh /usr/share/bcm43xx-fwcutter/ then apt-get install bcm43xx-fwcutter Done.
install_bcm43xx_firmware.sh
Description: Bourne shell script