Instant pro at any game!
Install under \*ALL
then load up the game and submit your score to the leaderboards
a IME dialog will pop up asking you to enter your REAL score,
enter whatever you want and click enter- this score will be submitted to PSN Leaderboards.
NOTE: Sometimes PSN Leaderboards take a bit to update, and you might have to wait about a min for the score to show up.