Gravity fix (patch of gravity) for GTA San Andreas

Originally the GTA SA, CJ falls at a speed of 55 m/s (without a parachute), and, of course, the reality is not so ...
In fact, all objects are starting to fall at a speed of 0 m/s, and average speed, the acceleration of 9.8 m/s ^ 2. First, the speed will be low, but then will increase.