Hardball 5 Cheats (PC)

To automatically hit a homer press 1,2 at the same time.  Then
  hold down the down arrow all held down at once, then you have either
  missed it or homered.

  To get a hit 4 out of 5 times make the pitcher only have a fastball.
  Then make it 94 mph.  Then when you are choosing, power contact,
  bunt press left, right, shift. Then choose power and swing normally
  and bam a base knock.