kernel_args into 7141: a question

[Alpamayo]

Hello,
I have a Fritz!Box Fon Wlan 7141, firmware version 40.04.15, annex B.
I wanted to convert it to Annex A (since I live in Italy) and took a look at Haveaniceday's patch named:

fritz_as_avm_annex_a_kernel_args.tar

Such patch does NOT work on my 7141 and I also noticed that the directory /proc/avalanche/env does NOT exist.

Using telnet I found the environment directory in a different position:

/proc/sys/urlader/environment

The question is: do I have to change the script to reflect the new environment directory? Is the script I'm posting below correct?

#! /bin/sh
INSTALL_SUCCESS_REBOOT=1
INSTALL_OTHER_ERROR=6

LED_DEVICE=/proc/led_mod/led
if [ ! -f /proc/led_mod/led  ] ; then
    LED_DEVICE=/var/led
    echo "set led: ${LED_DEVICE}"
fi
##################################################################################
# Power LED blinken lassen
##################################################################################
echo "set INFO led to blink (modul=7, state=4)"
echo 7,4>${LED_DEVICE}


PROVIDER=avm
######################
if [ ! -d /usr/www/$PROVIDER ]
then
    echo 7,1>${LED_DEVICE}
    /sbin/reboot &
    exit $INSTALL_OTHER_ERROR
fi

# Box auf $PROVIDER setzen
echo "firmware_version $PROVIDER" > /proc/sys/urlader/environment 
echo "kernel_args annex=A" > /proc/sys/urlader/environment

echo 'echo $0: done' >/var/post_install
chmod +x /var/post_install
echo "set INFO led to blink (modul=7, state=4)"
echo 7,4>${LED_DEVICE}
exit $INSTALL_SUCCESS_REBOOT

Thanks for your help and Merry Christmas.