Multiple Goals
When you score and the ball has gone over the line, but before your player begins to celebrate, pause the game and watch the replay. Each time you watch the replay an extra goal will added to your score.
50% success rate. 

Magnetic Ball
In an exhibition match, press Start, then press Up, A, Up, A. The game will leave your match. Then, start a new match and in the general settings there will be a new option called 'Magnetic Ball'. Activate it to stop your losing possession.

Go to: Pro Evolution Soccer 4 Info Page | nGaming Home Page.