Instructions
Select "Accessory Settings" from the settings menu on the PS3 XMB dashboard and choose "Manage Bluetooth Devices" from this sub-menu.
Register your headset with the PS3 by selecting "Yes" when asked if you want to register the device.
Select "Start Scanning" once you've turned on your Bluetooth headset. The PS3 will scan for devices and will show a list of nearby Bluetooth devices. Select your device from the menu and continue by pressing "X."
Enter your Bluetooth headset's passkey when prompted. Confirm that you entered it correctly and press "X" to continue. Your headset is now registered with the PS3 and can be used to communicate with other players online.
Load your copy of Warhawk into the PS3 and start or join a multiplayer game.