Couple of issues with lscustomsV1.2

Hey there, I have a problem with my lscustoms, maybe somebody here had the same issue and is willing to help me? Sorry in advance, but this is my first post here. I always try to look for the answers myself, but sometimes the worst comes to the worst and google and other sources die out. Well to keep a long story short I downloaded this for my fivem server, got the add on ofc. Made the tuning work(it took me about 11h to do it) but my problem is as follows: Is there a way to make a add-on car that has liveries always spawn vanilla and add the liveries only via lscustoms? If anybody has experience with it I would be much obliged if they could stand out and help. Thanks guys!