this one is fairly easy, just pick the best team, such as barcelona, or the Classic XI Team, pick an opponent who is the weakest of the game, for example a team from the mexican league. set the half time duration at 10 minutes, you will have plenty of time to score all the goals you need..
if however, you don't succeed, try messing with the formation of the mexican team. put the weakest players in the starting 11, sort all the players on the side of the pitch, so you can just walk through to the goal and score the goals
and don't forget to play Semi-Pro ;)