first off, thanks for offering this code. I'm just getting into LinuxMCE right now and it's great to see that there is already some Insteon support.
In any case, pertaining to the tutorial. I had a little trouble reading this line:
This driver supports ONLY the Powerlinc Modem model (PLM)# 2412S. If you have a 2414, this code will NOT work. You have a Powerlinc CONTROLLER. or PLC
Correct me if I'm wrong, but are you trying to say
This driver supports ONLY the Powerlinc Modem model (PLM)#2412S. The code will NOT work for a model #2414 also known as a Powerlinc CONTROLLER (PLC)
Just a small point, but I thought it might be helpful.