@TheMurderousCricket
I'm using Menyoo the latest 1.0.1
Everything is working great, I have tried hundreds of cars. Just that one particular one seems to have a glitch.
If you look at the picture you will see two cars. The first one shows what the problem is, but the second one has the correct tires/wheels and then it quickly goes away and looks like the first car.
https://ibb.co/sJzXxRv

I figure it out finally. When creating a backup of the entire GTA folder, I wanted to modify the GTA inside the backup folder and play the game from that folder.
You have to edit registry to direct it to the folder you have your modified game. For me, it was set to the original GTA folder. Once I changed the registry to the modified folder, the game ran with mods. (no need for no-gtavlauncher)
I also left the "Heap adjuster" and "Packfile limit adjuster" inside and there is no issues at all so far. But I need to do further testing to make sure it is absolutely stable. But so far I've played around a little over an hour and 2 missions and screwing around, spawning guards and cars.

The only slightest issue I see is when spawning one particular vehicle the vigilante (batmobile) The car spawns and the back tires quickly change from the dual huge batmobile tires, to normal car tires. I think I need the spawn multiplayer cars mod. Anyone?
Everything else is spawning just fine.

@TheMurderousCricket
Hi, scripts and mods folders are empty right now. I'm just trying to get the game stable. So only mod would be trying to use Menyoo.
I could try removing the "Heap adjuster" and "Packfile limit adjuster" but from reading tutorials it seems like it's a necessary thing to use in the future.

Image of folder
https://ibb.co/s2WGfPx

@TheMurderousCricket
Thank you for letting me know that it's a buggy launcher.
But I don't understand why I can't get mods to work without it. It's like am I the only one this is happening to?
Should I delete everything a re-download the 80GB game?

Can someone please just tell me am I modding the right way? Do you see me doing anything wrong?
Isn't it strange that the mods only work with No-GTAVlauncher?

Just installed the game and I'm running it from a copied folder. I have copied the game folder so in event something is wrong, I have original copy in different folder. Not sure if this creates any problems?

Version 1.0.1604.0

latest versions of Script Hook V, (inside root)
Script Hook V DOT NET, (inside root)
Microsoft .NET Framework 4.5.2 or higher,
Microsoft Visual C++ Redistributable Package for Visual Studio 2013 (x64)
OpenIV latest
Heap adjuster
Pack file limit adjuster (inside root)
Latest Menyoo (inside root)
Native Trainer came with scripthookV (inside root)

The only way I can get mods to work is if I use No-GTAVlauncher which is designed to make the game load up faster and bypass Social Club launcher. But then I'm getting crashes, games exits without any messages. Why do mods not work without this No-GTAVlauncher?
What am I doing wrong here?

// edit ReN : moved

So actually I can't get it to be stable. It started crashing and sometimes it will go a while, sometimes just 5 mins and crash.
But if I remove the No-GTAVlauncher, then it will launch stable for hours but no mod works. Not a single mod. Why?

Hi @MegaDeveloper Is there a way to retrieve a log when this happens or any other ways to trouble shoot a problem? In my case just an exit without any messages.
I can try to start reverting some files to original. But if there is a faster and direct way., please let me know. Thank you