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XBox - Freestyle Street Soccer cheats

In Main menu go to "Extras" than "Codes" and you can type in the passwords. 
If correct it will confirm at the bottom of the screen.

GM2OPEN8 - All Gamemodes 
A11T3AM5 - All Teams 
MAXSKILL - Max. Skills 
Z26BEXW8 - Micro Soccer 
E06J3CT5 - New Object in Inventory 
SPEEDY01 - Unlimited Turbo 
5Y104D9A - Unlock Streetballerteam 
WIMP_A.1 - Weak Opponents 

Tested on Pal-Version. Should work on NTSC too.