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

 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