Ah ok, thanks for the info!

I dont own a DS3 controller myself, so i dont have too much experience with it, but my sister has a DS3 controller. I guess i could borrow it from her just to see if it will improve my aiming or not.
Ye, that might be as you say, Killzone 2 doesnt seem have any aim assist, so maybe this is why i have abit trouble aiming sometimes. In the multiplayer i have somewhere around 1:1 in kill/death ratio, so i am able to get some kills at least

I guess i will just keep on playing the game and hopefully i will get more and more used to the controls in the game