To start with copy the sound folder from Common_client.zip to your \EA GAMES\Battlefield 2\mods\bf2\Objects directory Next while in the level editor right click in the 3d area and choose create ambient sound next give this object a name and press ok an object will appear Select the object and in the tweaker window click in the empty space beside filename When the dialog box shows up click on the + sign In the next dialog box use the dropdown menu to select bf2 a second time expand the sound folder and then the levelAmbients folder and choose one of the sounds from one of the subfolders then press ok press ok again This is an ambient sound so set the loopcount and stoptype to 0 also choose a MinDistance and a HalfVolumeDistance Thats it have fun goto the game and test it out , these sounds arn't very loud because they are ambient.