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.