Truck Follow Me / Push Back Truck

Using FS 2004 - I installed "U.S. Airports 1" and "MDG 737-800/900". On any of the 4 U.S. Airports in the U.S. Airports program, the "Turn On Progressive Taxi" does not work. I was told that I could use the "Push Back Truck" (which is usually parked close to the aircraft) or the "Truck Follow Me" to take me to the assigned Runway. Please advise. Thank you. Pepe