1. Connect the Nunchuck to the Wiimote and press Home to see the menu options.
2. Press A + 2 + Z together which should result in a short ?ping-like? sound.
3. You have now activated the interlaced mode.
4. Leave the menu and you should see the normal game screen.
5. To switch back to regular mode use the same method above and press A + 1 + Z.
I hope it will work for you!