* Once you have done all the above, YOU CAN now install your mods, and the game should work as normal with mods from now on, and not crash after the first mission. * Make sure all the side missions/activities have been unlocked at this stage (they all should be by the time you complete 'Corner Kids').
Then complete a few story missions, preferably until you get past 'Corner Kids'.
* Play the game as normal, it should work as normal and not crash after the first mission. * Remove all existing save game files for TBOGT and then reinstall TBOGT itself. Yeah, because it worked for me and solved the issue. Would you suggest I play the first mission without native trainer, then use it afterward? After some trial and error investigations, I realised that the game worked fine with mods and I played a few missions to unlock all the side features, then I missed it again, now it works fine with mods.It always crashed after the first mission. I had further problems with it, because it let mod it, but after the first mission save it didn't allow the game to start after that, it crash at the loading screen.
I unfortunately had to upgrade to 1.3 to play it smoothly, but unfortunately couldn't use the trainer mod.I'm using version 1.2.