Locate the file "unlocks.py" located in Program Files\EA GAMES\Battlefield 2\python\bf2\stats (or whereever you installed Battlefield 2, in the folders \python\bf2\stats), and open "unlocks.py" with Notepad.

(Before you open unlocks.py, you should make a backup of the file "unlocks.py" (just copy and paste the file) and rename the file to unlocks1.py)

Now you should see a whole bunch of codes. Press CTRL+F and find the word "defaultunlocks" (without the quotations).

this should highlight the line of code

defaultUnlocks = [0, 0, 0, 0, 0, 0, 0]

change all the "0"s to "1"s, so it looks like

defaultUnlocks = [1, 1, 1, 1, 1, 1, 1]

and now press CTRL+S to save.

Note: this only works for single player, this trick works for multiplayer, however, EA Games will ban your CD-Key for a week if they discover you are using this for multiplayer. So just replace the unaltered backup file of "unlocks.py" for multiplayer and vice versa.

To skip the intro movies when you load up Battlefield 2, delete the Dice, EA, Intro, and Legal Bink Video files from your EA Games\Battlefield 2\mods\bf2\Movies folder.

To play Battlefield 2 in a window, right click your Battlefield 2 shortcut. In the Target section, change "+ fullscreen 1" to "+ fullscreen 0" You will get a windowed version of the game.

This glitch allows you to stay outside of the map forever, where you should normally hear the "Where do you think you are going soldier..." message.

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