Unlimited Player Attributes:
At Player Edit Screen enter L1, L2, X, Square, X.
At Club Transfers Screen enter Square, X, Square, L2, L1
At the in-game Option screen press Square, Triangle, X, Square, Triangle, Triangle, X, X, Square, Square, Square, Square, Square, Triangle, Triangle, Triangle, Triangle, Triangle. Then you will be able to fiddle with the floodlights until you are satisfied.
Complete all the leagues of all the countries and then go to the player edit menu. There you will see a new button which says "Champions League." Select it and you will join into a league with the champions of all the countries.
Thanks to Revolution readers Nick Davies, Alexander Tsagalides, Roy and JWS!