Unlock Unlimited Creation Points

Got to Rosters, then Edit Player.  Select the players you wish to be rated "99".  Next, go to his attributes and simply raise every bar.

Unlock Barry Sanders

Get a gold ranking in the RB Ground Attack drill in Mini-Camp Mode on the All-Madden Level.

Unlock Deion Sanders

Get a gold ranking in the DB Swat drill in Mini-Camp Mode on the All-Madden Level.

Hear Thanksgiving Commentary

Set the system date to the third Thursday in November.

Hear Chirstmas Commentary

Set the system date to December 25th.

Hear New Year's Commentary

Set the system date to January 1st.