mopar EVS 1 alarm system

[Cummins Cowboy]

I would like to add the factory alarm system to my new 06, Today I talked to the parts guy and they said they can get it in, but would prolly have to use a DRB tool to reflash the system for it, this will cost me $100 or so to do, Does anyone know if this is true or not?? I was hoping I could just plug the thing in, I only want it to go off if the doors are opened without the key