On the main menu go to Edit Mode. Once there go to edit Player from the menu. In this menu select Enter Number at the bottom of the list. Enter the following in this screen:
1999 - Increases all players stats by 5 points
2999 - Decreases all players stats by 5 points
Easy Wen
To get easy Wen to buy things at the WE shop, play the International cup under the one star difficulty setting. When you win one game, you will get about 200 Wen. When you win the whole thing, you will get 2,000 Wen, which could be used to buy classic teams.