How does NCS know which files to use? Because it knows by looking at your VIN and VO, then selects the correct files. These files are basically from your /DATEN/ folder and contain the proper coding information specific to your car. 'xx' is usually the specific Coding index used in your default module, its a number. On Post-02 cars It will say 'LSZ' and underneath 'SG_Codieren' along with some files LSZ.Cxx, LSZ.PRG, etc etc. On Pre-02 cars It will say 'LSZ' and underneath 'SG_Codieren' along with some files LSZ.Cxx, LSZ.PRG, etc etc. Select the chassis, then module you F'd up on. Hit 'VIN/ZCS/FA' to load your Chassis and Vehicle order info Open FSW_PSW.MAN, select all, delete, save & exit. To load up the ORIGINAL factory defaults if you mess up.