Start downloading and save the igo-oem-world.zip file to your hard drive.
Unzip the file with a suitable program on your computer.
Restart iGO software. Now there should be three files in the speedcam directory:
Go outside with your navigation device and wait for receiving real GPS signals (GPS fix).
Enable alerts in settings (e.g. iGO 8: Settings > Warnings > Speed Camera Warning).
Now your iGO navigaton is ready for a safe trip.