Pro Evolution Soccer 3 cheats and cheat codes for PC

Increase all players' stats by 5 points. 
Go to the main menu, then choose "Edit Mode", after go to "Edit Player", 
and select "Enter Number". Enter 1999.

Decrease all players' stats by 5 points:
Go to the main menu, then choose "Edit Mode", after go to "Edit Player", 
and select "Enter Number".Enter 2999.

Change player stats:
Go to the main menu, then choose "Edit Mode", after go to "Edit Player", 
and select "Enter Number". Enter one of the following cheat codes:

Team  - Add stats - Subtract stats:
Yorkshire (Leeds United) 1071  2071 
WM Village (Aston Villa) 1066  2066 
Westfalen (Borussia Dortmund) 1087  2087 
West London White (Fulham) 1070  2070 
West London Blue (Chelsea) 1068  2068 
Weser (Werder Bremen) 1091  2091 
WE United 1125 2125 
Wales 1030 2030  
Valdai (Spartak Moscow) 1111  2111 
Uruguay 1049 2049  
United States 1041  2041 
Ukraine 1029 2029  
Tyneside (Newcastle United) 1075  2075 
Turkey 1028 2028  
Tunisia 1037 2037  
Triveneto (Udinese) 1104  2104 
Trad Bricks (Manchester United) 1074  2074 
Tiberina (Perugia) 1103  2103 
Switzerland 1027 2027 
Sweden 1026 2026  
Stadhuisplein (PSV Eindhoven) 1107  2107 
Spain 1025 2025  
South Korea 1053 2053 
South Africa 1036 2036 
Slovenia 1024 2024 
Slovakia 1023 2023 
Serbia and Montenegro 1022  2022 
Senegal 1035 2035  
Scotland 1021 2021 
Saudi Arabia 1054 2054 
Russia 1020 2020  
Ruhr (Schalke 04) 1090  2090 
Rondinelle (Brescia) 1097  2097 
Romania 1019 2019  
Rhone (Olympique Lyonnais) 1081  2081 
Rhein (Bayer Leverkusen) 1085  2085 
Rekordmeister (Bayern Munich) 1086  2086 
Puerto (Porto) 1109  2109 
Praha (Sparta Prague) 1064  2064 
Portugal 1018 2018 
Poland 1017 2017  
Piemonte (Juventus) 1100  2100 
PES United 1126 2126 
Peru 1048 2048  
Peloponnisos (Olympiakos) 1092  2092 
Parma (Parma) 1102  2102 
Paraguay 1047 2047 
Other (Freelance Players) 1127  2127 
Old Firm Green (Celtic) 1112  2112 
Old Firm Blue (Rangers) 1113  2113 
Norway 1016 2016  
Northern Ireland 1015  2015 
North London (Arsenal) 1065  2065 
North East London (Tottenham Hotspur) 1076  2076 
Normandie (Paris St. Germain) 1083  2083 
Nord (RC Lens) 1084  2084 
Nigeria 1034 2034  
Netherlands 1014 2014 
Naranja (Valencia) 1121  2121 
Museumplein (Ajax) 1105  2105 
Morocco 1033 2033  
Mexico 1040 2040  
Merseyside Red (Liverpool) 1072  2072 
Merseyside Blue (Everton) 1069  2069 
Marmara (Dinamo Kiev) 1124  2124 
Manzanares (Athletico Madrid) 1114  2114 
Longobardi (Internazionale) 1099  2099 
Lloyd (Manchester City) 1073  2073 
Lisbonera (Benfica) 1108  2108 
Lazio (Lazio) 1101  2101 
Languedoc (Marseille) 1082  2082 
Lancashire (Blackburn) 1067  2067 
Japan 1052 2052  
Jamaica 1039 2039  
Italy 1013 2013  
Ireland 1012 2012  
Iran 1051 2051  
I Mussi (Chievo) 1098  2098 
I Dotti (Bologna) 1096  2096 
Hungary 1011 2011  
Hauptstadt (Hertha Berlin) 1089  2089 
Hanseaten (Hamburg) 1088  2088 
Guadalquivir (Real Betis) 1115  2115 
Greece 1010 2010  
Germany 1009 2009  
Galicia Sur (Celta Vigo) 1116  2116 
Galicia Norte (Deportivo La Coruna) 1117  2117 
France 1008 2008  
Finland 1007 2007  
Feyenoord (Feyenoord) 1106  2106 
Esportiva (Sporting Lisbon) 1110  2110 
England 1006 2006  
Egypt 1032 2032  
Ecuador 1046 2046  
East London (West Ham) 1077  2077 
Donosti (Real Sociedad) 1120  2120 
Denmark 1005 2005  
Czech Republic 1004  2004 
Croatia 1003 2003  
Costa Rica 1038 2038 
Constantinahce (Fenerbahce) 1122  2122 
Colombia 1045 2045 
Classic Netherlands 1062  2062 
Classic Italy 1061  2061 
Classic Germany 1060  2060 
Classic France 1059  2059 
Classic England 1058  2058 
Classic Brazil 1057  2057 
Classic Argentina 1056  2056 
China 1050 2050  
Chile 1044 2044  
Chamartin (Real Madrid) 1119  2119 
Cataluna (Barcelona) 1118  2118 
Cameroon 1031 2031 
Byzantinobul (Galatasary) 1123  2123 
Bulgaria 1002 2002 
Bruxelles (Anderlecht) 1063  2063 
Brazil 1043 2043  
Bourgogne (Auxerre) 1079  2079 
Belgium 1001 2001  
Azur (Monaco) 1078  2078 
Austria 1000 2000  
Australia 1055 2055 
Athenakos (Panathinikos) 1093  2093 
AS Rome (AS Roma) 1095  2095 
Argentina 1042 2042 
Aquitaine (Bordeaux) 1080  2080 
AC Milan (AC Milan) 1094  2094 

Real team names:
The following are the real world equivalents to the team's in the game. 

Abruzzi: Udinese
AC Milan: AC Milan
Aquitaine: Bordeaux
AS Roma: AS Roma
Athenkos: Panathinaikos
Azur: As Monaco
Bourgogne: Auxerre
Bruxelles: Rsc Anderlecht
Byzantinobul: Galatasaray
Cataluna: Barcelona
Chamartin: Real Madrid
Constantinache: Fenerbache
Donosti: Real Sociedad
East London: West Ham United
Emilia Sud: Bologna
Esportiva: Sporting
Feyenoord: Feyenoord
Galicia Norte: Deportiva La Coruna
Galicia Sur: Celta Vigo
Guardalquivir: Real Betis
Hanseaten: Hamburger Sv
Hauptstadt: Hertha Berlin
Ill De France: Paris St Germain
Juventus: Juventus
Lancashire: Blackburn Rovers
Languedoc: Marseille
Lazio: Lazio
Lisbonera: Benfica
Lloyd: Manchester City
Lomabardia: Internazionale
Longobardi: Brescia
Manzanares: Atlético Madrid
Marmara: Dinamo Kiev
Merseyside Red: Liverpool
Meryseyside Blue: Everton
Museumplein: Ajax
Naraja: Valencia
Nord: Racing Club Lens
North East London: Tottenham Hotspur
North London: Arsenal
Old Firm Blue: Rangers
Old Firm Green: Celtic
Parma: Parma
Peloponnisos: Olympiakos
Prague: Sparta Prague
Puerto: Porto
Rekordmeister: Bayern München
Rhein: Bayer Leverkusen
Rhone: Lyon
Ruhr: FC Schalke 04
Stadhuisplein: Psv Eindhoven
Trad Bricks: Manchester United
Tyneside: Newcastle United
Umbria: Perugia
Valdai: Spartak Moscow
Veneto: Cheivo Verona
Wesr: SV Werder Bremen
West London Blue: Chelsea
West London White: Fulham
West Midlands Village: Aston Villa
Westfalen: Borussia Dortmund
Yorkshire: Leeds United

Master league:
When you want to acquire a good player, such as Ronaldo, Beckham, Zidane, etc.,
save the game. After, go to "Edit" and make the players you want to purchase bad. 
Set all their stats down to about 1 to 10. Then, go back to your game and buy them 
cheaply. Save your game, go back to "Edit", and increase their stats again.