Since the Release of FPS Engine 1.2 the Location of the Camera and Weapon Effects has changed
This guide is up to date.
WeaponEffects and CameraEffects can be found in the Player.
Here you can modify the values as you wish
To modify the Weapon Sway Settings, as specified in the Weapon Effects component, you will need to open your Weapon Prefab, as the Weapon Sway effects varies depending on the Weapon. This WeaponSway.cs is located at the root of the Prefab.