I know this is an old topic, however I just purchased a TK-3173-K off fleaBay and its locked where I can't read it or write to it with a blank data archive allowing me to change frequencies. I have the Kenwood Version 2.40 of KPG-101D software but need details on the "dealer/engineer serial install key" mentioned at the start of this thread. Any input on how to make this radio programmable would be greatly appreciated. Thanks