So basically I cannot install anything to mod folder... The game always crashes with out of memory error... Does anyone have any advice for that?

Hi guys!

I just installed an add-on car pack, it has 7 cars and each one works fine. However, I just noticed, after I installed it, some of my other add-on cars missed their tuning parts. And I can only see and change Lights, Plate, Wheels and Color in Customs. I tried to change the id of it's tuning in carcols and carvariations but didn't work. Is there anyone who can help me with that? Should I change other things? Thank you!