FPSController Prefab - How can i change the Z position of my camera?

I'm Using the FPSController that comes with the standard assets, i can quite happily alter my camera's Y position and when i run my scene it stays where it is but when i try to change the cameras Z position it snaps back to it's original position at run time. I gather it's got something to do with the first person controller script but i'm a bit of a tard and need it spelled out.

Cheers :D