Ah, I know what the problem is, you see the Steam version (I used to play with that too) has many of the original game files changed. If it crashes once you enter your vehicle then you have to replace the car radio files of the steam with the original ones. Let me send you a link: https://mega.nz/#F!5sUUBARb!lPjJjTJ4V2T8HnLCu2CpKg (This file contains all the original audio). Because I used to play with the steam version downgraded, many problems popped up so if you have any more I suggest you ditching the steam version and download the original game from here: https://mega.nz/#!EBA1QBZB!mAPGn6jqnTQ6jK0qc2vReZTaIYe3zEbQsCV2foaOJg4