Edit your soccer.ini file in your game directory and add the following lines for cheats, then run game as usual:
FIFA World Cup 2002 Cheat Codes (English) Free Download
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