this pic was posted by some one else so you can see what you are doing with the paper clip.
look in the pic:
*take the paper clip and place it in to the slit (red)
*take a bright flash light and shin it in to the other slit (yellow)
*if you follow the blue arow, at the end of the case you will see a slit on the side of the n3( when following the blue arow).
*the lite green is the the factory set and the dark green line is the bypassed.
*by doing all of this you should be able to see in the slit at the side of the case and see the switch and using the paper clip push it in to slide the switch. the 90* helps push it over and if you have to send it in for service you can use the paper clip to slide the switch back in to place.
when done right you dont void the warranty and get video while you drive witch we all want.