[Request]How to use more keys

[peepers]

Right i know that there is a script to use all keys i have Try'ed this but i never succeed i never knew how to use it because i am a Noob so what i need help with is a script or something that will let me use any key for the main keys you know how you press F1 when playing and you can change the keys well i want to be able to use any key in there.