Yep, it's just like having your keys duplicated. I once accompanied a friend to Banawe to buy a replacement remote transmitter for his Viper 900, yung 4 buttons pa. They were able to copy his orig remote in 10 minutes! They would just switch the ignition to the 'on' position then press the buttons on the "blank" remote in a certain sequence and walah, its done! That was 6 years ago, if I remember right, they charged him P1,200 for the new remote.:D