Put all the files on Main at Call of Duty 4 folder, and put all this bind's at the config.

bind F1 "exec backlot1.cfg; ^0..::^7Backlot1^0::.."
bind F2 "exec backlot2.cfg; ^0..::^7Backlot2^0::.."
bind F3 "exec city1.cfg; ^0..::^7City1^0::.."
bind F4 "exec city2.cfg; ^0..::^7City2^0::.."
bind F5 "exec crash1.cfg; ^0..::^7Crash1^0::.."
bind F6 "exec crash2.cfg; ^0..::^7Crash2^0::.."
bind F7 "exec cross1.cfg; ^0..::^7Cross1^0::.."
bind F8 "exec cross2.cfg; ^0..::^7Cross2^0::.."
bind F9 "exec strike1.cfg; ^0..::^7Strike1^0::.."
bind F10 "exec strike2.cfg; ^0..::^7Strike2^0::.."
bind F11 "exec strike3.cfg; ^0..::^7Strike3^0::.."

I didnt put this bind's on config already becouse some people dont like it so give it a try and enjoe ;)

xfire:malditojr