This game is also available on Xbox 360.
This stops the start up movies from loading up so you go straight to the log in screen and prevents valuable ram space from being used to play the movies
eg"C:\Program Files\EA Games\Battlefield 2\BF2.exe" +playerName ALIBOY +playerPassword ACCESS
If your name was ALIBOY and your password was ACCESS. Note that the command is case sensitive.
You can do this with a friend for example by making a squad together. What you do is this: The squadleader goes out into the red zone where you hear the previously mentioned message and you spawn in on him. You can stay outside the map forever. Have your friend die and leave the squad so you become squad leader and let him spawn in on you. Now the two of you can stay outside and never die from the out of bound penalty.
Known to work upto 1.02