Select the EA Sports logo at the menu. Note: It turns into something that looks like your "A" button when the pointer moves over it. Select "NFL Rosters", then "Trade Player". You can make your team the best possible. If you run out of cap room, press B and select "NFL Rosters" again then "View Rosters". Select your highest paid player and make him a bad player (rating 49 or less). Release them and re-sign them. Then make him a good player again and they will be paid less than $1 million.
Select "EA Extras" at the main menu. Select "Enter Game Code", then enter one of the following codes to activate the corresponding cheat function.
After a touchdown, kick your extra point as high as possible with a good amount of power. When it gets higher than the field goal, and the screen reads "Kick Is Good", your football will become frozen and start front flipping directly above the field goal.
Enter THEWORKS as a code. All bonuses will be unlocked.
Enter YOUCALLIT as a code.