This will change some of pick up truck
How to:
1 open file one (1) and copy the file, and you will paste it there:
C:\Program Files (x86)\Steam\steamapps\common\mafia ii\pc\sds\cars
2 open file two (2) and copy the file, and you will paste it there:
C:\Program Files (x86)\Steam\steamapps\common\mafia ii\pc\sds\cars