Not in Idonesia, but in a similar "everyone smokes you're an outsider if you don't" environment- I quit cold turkey on Jan 1st 2006 while living in Russia. Have not smoked even 1 cigarette since then - and I was a 2-3 pack a day smoker (minimum 2, but more if out partying late) of strong cigarettes (Dunhill Reds or Marlboro Reds).
I suppose everyone is different, but I somewhat disagree with waarmstrong about it being a group effort - I think it has to be a personal effort and strong personal commitment - of course you need those around you to support your decision, but you have to really really strongly want it personally to be able to have the discipline to get through the rough spots at the beginning. For me, I just decided (due to health concerns - "fear of cancer") that I didn't want to smoke anymore. Picked a day (I made the decision in December, and 1 Jan seemed a good day for obvious reasons), and I stuck to it. I did not use any substitutes. The first few weeks were the worst, then it gradually got better. I think the studies show that the physical addiction part goes away after a relatively short period. For me, breaking the psychological "patterns" were harder to deal with than the physical addiction to nicotine. What I mean by that, is the habits formed through years of smoking - having that cigarette with your coffee, after a meal, with drinks at the bar, etc etc. Triggers where it had become second nature to just reach for a cig. That is what you need the strong willpower and desire to succeed to avoid relapsing....and remember, you can't "have just one" in a difficult time or you are back to square 1.....