Entering/exiting script

Hello!
I have been working on a Entering/Exiting script, but when entering, i wan’t to disable the FPS-Controller and it’s children and enable the tank camera.
Can someone give a example?

you can use the gameobject.active to disable the script. you can also switch which camera is active the same way.

http://unity3d.com/support/documentation/ScriptReference/GameObject-active.html

for your camera’s i would tag them and find them through tags