Hey Guys the annoying persons back

here the thing if you go on ff viewer and type _uav you get maps/mp/killstreak/_uav

now this is obviously the place wewre you get the uav from here the thing if i take this script and modify it how do i make ir so i can use it??

//Easy Pain-less summary on what im saying\\
1. can i mod the _uav.gsc
2. if so how do i use it or link it

//EDIT\\
1. i have killstreak.gsc in killstreak folder (straight and saved from ff viewer)
2. i tried to change part of harrier.gsc nothing happened
3. Why do i want too know? for my personal GOOD killstreak =D