Edit your soccer.ini file in your game directory and add the following 
lines for cheats, then run game as usual: 

Text Description 

CHEAT_UNLOCKED_TEAMS=1 Unlock All World Team, All Americas 
Team, All Asia Team And All Europe Team 
UNLOCK_TOURNAMENT=1 Unlock Tournaments 
AGGRESSIVE_TACKLE_CHEAT=1 Enable Aggressive Tackle Cheat 
CHEAT_EQUAL_TEAM_STATS=0 Equal Team Stats 
CHEAT_RANDOM_TEAMS=1 CPU Selects Random Teams 
DEMO_MODE=1 Run Game In Demo Mode 
WINDOWED=1 Run Game In A Window