At rewards screen, press Square to access the unlockable cheat options

Big Melon - Big head players :)
Win the European Champions' Cup

Crazy Ball - ball move in a crazy path during passes when you press Square :)
Win the EFA Trophy

Stay N Play - ball will always rebound from the touchline :)
Win the European Championships.

They All Fall Down - players will all fall down if the ball remains in possession for too long :)
Win the Copa America.

Eye Catcher - Giant Ball :)
Win the Gold Cup.

Scrimmage
Win the Champion's League (ECC) and whatever League Title (i.e. Premeireship) under professional mode. All the lads are gone out for a pint and only five players remain. Its indoor footie at its finest. There are also no bookings.

From Outside
Win the Champion's League (ECC) and whatever League Title (i.e. Premeireship) under professional mode. From outside the 18 yard box, if you put the ball in the onion bag, the goal is worth two.

Bonus tournaments:
Unlock the corresponding bonus tournaments when you win the following World Cup qualifications

AFC: Asians Nations Cup
CONCEBOL: Gold Cup
CONCACAF: Copa America
UEFA: European Championships (Euro 2004)

Complete all rewards except the last locked one to unlock the FIFA Confederations Cup.

Panini cards:
Unlock the corresponding Panini cards at the rewards screen when you win the following events

AFC World Cup qualification: Myung Bo Hong
UEFA World Cup qualification: Francesco Totti
CONMEBOL World Cup qualification: Roberto Carlos
CONCACAF World Cup qualification: Ruud Van Nistelrooy
EFA: Nuno Gomez
European Championship Cup: Iker Casillas
European Championship: Thierry Henry
Copa America: Henrik Larsson
Gold Cup: Thomasz Rodzinski
FIFA Confederations: Steve Marlet

Fake cross over:
Hold L2 + R2 while kicking and your player will fake a cross over.

Special moves:
Hurdle: Tap L2.
Shimmy: Tap R2.
Drag-Back: Tap L2(2).
Flick-Over: Tap R2(2)