Flying helicopters in GTA IV using the keyboard
Solution 1:
I don't have experience with GTA IV, but it sounds similar to the controls/physics for Vice City:
- Don't hold the keys down as much, try tapping more. This will give you more incremental steering until you get used to the controls a bit more.
- Finish your turns early, there's usually a bit of inertia that will keep you banking.
- Relax, you're going to be more tense when you feel clumsy, take a few attempts and mess up on purpose just to get a feel for the heli, crashing into buildings/water, flipping upside-down etc.