Set the game to easy difficulty, test match (Gives you two innings, two tries) and choose a bowler that you want your five wickets with. Personally i opted for Graeme Swann of England, good spin bowling normally does the trick no matter who you choose. The way i'd advise is to use your wicket taker (Spin Bowler) for an over, then next over use a fast bowler to attack the wicket. The batter will almost always block the fast bowler giving you more wickets to take with your spin bowler. Those 20 G's are yours!