Want to disable friendly fire in BF2 Demo? Go into My Documents > Battlefield 2 Demo > Profiles > 0001 > ServerSettings.con (open up with wordpad).

Find something that looks like this

[code:15dd5]
GameServerSettings.setSoldierFF 100
GameServerSettings.setVehicleFF 100
GameServerSettings.setSoldierSplashFF 100
GameServerSettings.setVehicleSplashFF 100
[/code:15dd5]

Change it to

[code:15dd5]
GameServerSettings.setSoldierFF 000
GameServerSettings.setVehicleFF 000
GameServerSettings.setSoldierSplashFF 000
GameServerSettings.setVehicleSplashFF 000
[/code:15dd5]