I recently have been adding (no replacing) new cars into GTA IV using the help of this awesome Tutorial founded on GTA Forums.
But I have a question.
How can we add new bikes into game? I tried once, the game crashed and only with a reinstallation I got my game working again.
And police cars with lights and "Police Computer" working? How to add them? Somewhere is a file where this information is in.
I really would like to open a new theme and maybe a new era of Adding Cars into GTA IV.