Cheats & secret moves:

Bash Opponents
     To bash your opponents (injure them) you have to do the following:

Turn bookings off.
     Go to the referees strictness, make it defined and pull the bar left.

Put offside off.
     When  you're  playing  start pressing Q to the players, this will
make your players bash the opposition without getting a card or a free
kick.

Finding Ronaldo
     Ronaldo can be found as G. Silva on Inter Milan and Brazil.

Secret moves
     Press these keys while playing the game:

Alt+A - Rainbow kick
Alt+S - Drag the ball
Alt+D - Spin
Alt+Q - Fake a trip
Alt+E - Double step-over
W     - Sprint

Play Classic Games 
     At  the  opening  screen  type "the oldies". Now you can play old
matches like the finals of champions league in 1988.