Go to player edit and go to someone from another team. Take all their skills down to 35 and when you are on the side go to your team and make any player perfect.
Increase Team Bankroll
Go to the team edit screen and press Square X Square L2 L1. Once entered you can highlight the money option and change the amount.
Unlimited Player Attributes
At the Player Edit screen higlight any one of the attributes and press L1 L2 X Square X.
Control Ball Physics PAL Version
At the Team Edit screen press Square X Square L2 L1.
At the Team Selection screen press R1 L1 Down Up Left.
Pause gameplay and press Square Triangle X Square Triangle Triangle X X Square6x Triangle5x.