Because EA no longer supports or sells this title, many preservation sites legally host it as abandonware. The safest, most trusted source is:
While the game supports keyboard controls, it shines with a gamepad. Connect an Xbox or PlayStation controller via USB or Bluetooth. You may need to use third-party software like to map the dual analog sticks correctly so the Skill Stick behaves exactly like the console counterpart. Enhancing the Game: The NHL 08 Modding Scene
Do not download pirated ISO files from torrent or file-sharing sites.