Modifying customized device drivers You can modify your custom device drivers in the resource set. You cannot modify native device drivers. If a modification of a native device driver is required, you must make a copy of the native device driver and modify the copy. See Duplicating a device driver. To modify a custom device driver 1 Open the resource set. 2 Right-click the device driver and select Start Editor. 3 Modify the device driver as required. See: – Adding device driver files – Adding device driver options – Device Tool GUI reference 4 Save the configuration and exit the tool.