All I did, was hide on the floor in the small ticket booth to the right of the ferris wheel. Due to the scripting/storyline the scottish guy cannot be killed by the enemy, so I just left him out there to shoot everyone one by one. I just laid on the floor of the ticket booth, any nades come in (which wasnt very many), I just threw them back out again.
Just laid there until the chopper arrived, then ran out, picked up the scot and ran into the helicopter. Once I realised that it was impossible for them to kill the scot, and impossible for them to kill anyone in the chopper, I just did that. Did the mission easily then.
Just laid there until the chopper arrived, then ran out, picked up the scot and ran into the helicopter. Once I realised that it was impossible for them to kill the scot, and impossible for them to kill anyone in the chopper, I just did that. Did the mission easily then.