mine doesnt have such controles, here is what defualt .cfg is for from its zip file:
[KeyDefinitions]
Move_Forward = "Up" "Kpad8"
Move_Backward = "Down" "Kpad2"
Turn_Left = "Left" "Kpad4"
Turn_Right = "Right" "Kpad6"
Strafe = "" ""
Fire = "LCtrl" ""
Open = "Space" ""
Run = "LShift" "RShift"
AutoRun = "CapLck" ""
Jump = "a" ""
Crouch = "b" ""
Look_Up = "PgUp" "Kpad9"
Look_Down = "PgDn" "Kpad3"
Look_Left = "Insert" "Kpad0"
Look_Right = "Delete" "Kpad."
Strafe_Left = "bakspc" ""
Strafe_Right = "tab" ""
Aim_Up = "Home" "Kpad7"
Aim_Down = "End" "Kpad1"
I mean if you want to use L to shoot, you'd change:
to
CODEFire = "bakspc" ""