All FMV sequences
Enter "SEECOOLMOVIE" as a password under the "Load Game" screen.
Avoiding turrets
When the turrets are shooting you, roll all the way and do not run.
Defeating Jong Ho
Equip the .45, then hide behind the crates to the right of the full ammo supply. Place your center bead on him and fire. He will eventually die. Do not worry about getting a clear shot, as you will see with incoming enemies they will die easily.