@DSKTX Providing support is often a difficult thing for community members - we're not all necessarily experts at every aspect of modding, and we often get requests from people that can't communicate effectively in English, get belligerent when they're not helped promptly, or just keep having issues that nobody can seem to solve. I'm not saying you fall into any of the above categories, just that it may explain the disillusionment with providing support at times. That said, in your latest thread, you had a user trying to help but you didn't respond to any of the questions posed, so I'm not sure how you can expect the conversation to carry on. In any case, if you still want another option at support, you can try GTAForums.com, which is much more popular GTA forum.
Is there any amount of cars you can use that don't cause the game to crash? I.e. what happens if you only have one car and no wheel packs installed?
What (if any) script mods do you have installed? If you do have some, have you tried removing them?
That second one might seem unrelated but I spent a good while with someone yesterday with a similar problem and it turned out to be a script mod (namely Single Player Apartments) that was causing the problem.