To rename your soldier, which the game by default does not allow you to do, you must edit the file "\Battlefield 2\Profiles\0001\Profile.con" and change the first value, in the quotes, to whatever you wish your soldier's name to be. For example, change:
Wetlands - Crop circle
On the Wetlands map, there is a farm house and field in the center of the field. If you are in a plane or chopper you can see a crop circle there.