ESPN NHL Hockey 2K4 Edition Cheats (Xbox)

Go into Roster Manager, and Trade Players. For example you want
      the New Jersey Devils to win alot, you select their team, and
      press "y" then cycle through the teams and look for very
      good players (90+ overall) and select a couple of them, and trade
      them for players on the Devils such as Gionta or Stevenson who are
      not very good. Even if you trade a 70 overall person for a 90+
      person, the computer will accept. When you are done, go back to
      the roster manager screen, and select Player Status, select the
      devils, and scroll down the player names, and dress the players so
      they can play. then you go back to the roster manager screen once
      again, and go into Edit Lines, change the lines and put your
      players from the other teams into lines, and you will do very
      well.

  

  


  

This isn't really a cheat but more of a hint if you want to unlock
      more rewards on a higher difficulty level just go to GENERAL options
      and choose the difficulty you want then go to ADVANCED options and
      turn down the CPU skills and turn up the HUMAN skills