Hi, I would like to install the current labor firmware on my international Fritz!Box 7170 because i would like to use it as an ISDN-SIP gateway (connect the FB to the ISDN landline and register a few SIP phones). I don't care about the DSL-modem functions or any other functions. When i try to install the labor firmware i get the message that it's not compatible with my device. Is it possible to convert my FB to a German version or is it possible to modify the labor firmware (with Freetz) so i can install it on my international 7170? Thanks in advance!