According to the official manual you use the use key (That's the Spacebar for the PC game) to get in or out of a car.
The first nocd crack of the file GODFATHER.EXE messes up all theses settings.
So if you have "solved" your problem MaXXpayne, you have probably found another nocd crack for your illegal download. Good for you.
Referring to your EA Forum reply. Also in the EA Forum they've identified it was the crack.