Error Transferring Unity 5's FPSController to Unity 4.6

Hello,

I was trying to transfer the Unity 5 FPSController plus all it sources and standard assets into Unity 4.6. When I do this it says "Importing Small Assets" and then it closes and opens the Unity Error Reporter. I really like the new FPSController and the only reason I am not using it on Unity 5 is because of that terrain collision error. Could you please tell me what I need to export/import or at least if this is even possible.

Thanks