You can see the picture tutorial on their linked website, but I've also listed the instructions below:
1. Put on nail polish and let dry.
2. Dip fingernail in alcohol-basically any will do, vodka is suggested.
3. Press a strip of newspaper big enough to cover the whole nail on to your alcohol soaked nail.
4. Pull off slowly and be really impressed with yourself.
5. Paint top coat if desired.
(Note: I have not tried this... yet! Maybe I should stop biting my nails first.)