Madden NFL 08 Cheats
99 ratings for a team
First, go to my madden and go to player management. Then, you pick a player, go to edit player, and go to ratings. Last, increase the ratings and re-do to any other players. This won't work with created teams.
99 rating in superstar mode
Go to Create-a-player and create someone in the desired position, put him on the desired team, set years pro as 0, and then go to player rating and put all of them up. Then, go to superstar, new superstar, and play as rookie. Then pick the person you created.