A method is provided and includes generating a first simulated device at a device simulator. The first simulated device corresponding to a first physical device. Also, a second simulated device is generated at the device simulator. The second simulated device corresponds to a second physical device. At least one behavior extension file is loaded at the device simulator. Further, the behavior extension file is applied to the first simulated device or to the second simulated device. The method further includes selectively loading an application to the device simulator. The application can be selectively executed with respect to the first simulated device, the second simulated device, or to the first simulated device and the second simulated device. Also, the application can be modified at least partially in response to the execution of the application at the device simulator to produce a modified application.