In order to unlock these things, perform the action stated after it. You can also see what you have unlocked by selecting Rewards in the My FIFA 07 option from the main menu.
Unlockable - How to unlock
Home Stadium Upgrade 2 - Move into first place in the league, while playing Career Mode.
Giant Team Flag - Win a match in the Career Mode.
Home Stadium Upgrade 1 - Win a blowout in the Career Mode.
Goalkeeper Mini Game - Remain unbeaten in five games, in the Career Mode.
Interception Mini Game - Win ten games in the Career Mode.
Home Stadium Upgrade 3 - Win the league in the Career Mode.
Dribbling Mini Game - Win 5 games in a row, in the Career Mode.
Home Stadium Upgrade 4 - Win your domestic cup in the Career Mode.
Home Stadium Upgrade 5 - Win your domestic cup twice, in the Career Mode.
Home Stadium Upgrade 6 - Win the league twice, in the Career Mode.
Challenge Mode - Win five games.
Additional Chant FX - Win ten games outside of the Career Mode.
Classic Team - Complete the Challenge Mode.