When batting, to get a lot of runs press 'P' when the fielder picks up the ball to pause the game. The fielder will be frozen, but your batsmen won't. Simply waggle the joystick and your batters will run. You can now chalk up a high score. When you've had enough simply press 'P' again to unpause the game.
You can also press the 'Spacebar' twice while your bowler is running to start your bowl again.
NOTE: This cheat may also work on Brian Lara's WC Cricket as it is effectively the same game.