To be able to unlock players and sponsorship items go to the 'Options' menu and select 'Passwords' and then enter the following passwords (without the quotes).

Unlock all players in Team Play Mode:
Enter the password 'GAMEFACE'.

Unlock ALL Nike Items:
Enter the password 'JUSTDOIT'.

Unlock ALL Oakley Items:
Enter the password 'JANNARD'.

Unlock ALL Cobra Items:
Enter the password 'SnakeKing'.

Unlock ALL Adidas Items:
Enter the password 'THREE STRIPES'.

Unlock ALL Bridgestone Items:
Enter the password 'SHOJIRO'.

Unlock ALL Grafalloye Items:
Enter the password 'JUST SHAFTS'.

Unlock ALL MacGregor Items:
Enter the password 'MACTEC'.

Unlock ALL Mizuno Items:
Enter the password 'RIHACHINRZO'.

Unlock ALL PGA Tour Items:
Enter the password 'LIGHTNING'.

Unlock ALL Ping Items:
Enter the password 'SOLHEIM'.

Unlock ALL Precept Items:
Enter the password 'GUYS ARE GOOD'.

Unlock ALL Taylormade Items:
Enter the password 'MR ADAMS'.

Unlock ALL Level 3 EA Sports Items:
Enter the password 'INTHEGAME'.

At the 'Main' menu select 'Options' and go to 'Passwords' and enter 'SnakeKing' without the quotes to unlock ALL the Cobra gear.