the penalty system is getting some stick but if you read the command list in game it makes sense
you press shoot to start the run up then you press either UP or DOWN to put it either side of the goalie, this will result in a typical low shot to either side of the keeper the key is to not hold the direct for too long or it will go wide.
to add height to the penalty you press the way the player is facing to explain this a bit better (take your control pad the up and down will put it either side of the keeper as i explained but the directions in between ((top left / , and top right \ )) will put it in the top corners )
that's been my experience in the training mode, but the best advice is to hold the direction you want to put the ball for a bit not too long but more than you normally would
you press shoot to start the run up then you press either UP or DOWN to put it either side of the goalie, this will result in a typical low shot to either side of the keeper the key is to not hold the direct for too long or it will go wide.
to add height to the penalty you press the way the player is facing to explain this a bit better (take your control pad the up and down will put it either side of the keeper as i explained but the directions in between ((top left / , and top right \ )) will put it in the top corners )
that's been my experience in the training mode, but the best advice is to hold the direction you want to put the ball for a bit not too long but more than you normally would