Commander 2000 as standalone

[floydboyd@xxxxxxxxx]

I just bought a home with a Commander 2000 installed and ready to go
(power, sensors, siren).  I'm toying with the idea of using it without
a subscription or monitor service but not sure exactly what that might
entail.  The previous owner was using ADT.  I'm not too thrilled with
their high rates and 3-year obligation, so I would like to use it as a
standalone alarm.  I have the manual and understand I will need to get
the codes from ADT.  Is it that simple or is there more I need to
know?  Any advice would be great.  Thanks!