I Correctly install the bullet time mode useing the program called ALICE and I dont know how to use it, it says click TAB to use bullet time but it does nothing, (bullet time is slow motion shooting ,just in case)
Link to mod http://www.gta4-mods.com/script/bullet-time-f1871

I have the right version of GTA 4 and I put were it told me to, try it for yourself or if you already have please help me out.