put file script.img

here

Grand Theft Auto IV\common\data\cdimages

how to activation in game?

is automatic auto load if is start game
or call 663
or end mission its your call and click option menu in phone

if you see fps on left screen 
then will be instalation succes
if you fund game crash if you start game

sco starter and script.img is not compatybile with your game 

how to open
 
prees

left ctrl + right ctrl to open modloader