Its no harder than adding to TMCC to any other engine that has no command system except you have pull out the existing electronics first, maybe a bit simpler as you can reuse the existing tether. A Cruise Commander will easily fit in the engine and railsounds in the tender with room for at least two Fatboy speakers. Some of the detail you see has been added including the cab curtains and cab apron. Because it has a hard wire tether you won't have any serial data issues that can crop up with a Lionel wireless tether. Some modification of the smoke unit will be required like changing the resistor and separating the fan motor out from the circuit. You will have to provide a switch of some sort to generate the chuff signal.
BTW Cab Number 5330 with a PT came in a freight set.
Pete
