Thanks! Those are our cities new patrol vehicles. Along with 2015 Tahoes and 2014 Explorers. They are sweet, and I hope to make one for GTA V once some vehicle models come out and I figure them all out. :)
That is nothing that can be fixed. The lighting is set to the stanier so it may not be fully compatible. I don't know if anyone has found a solution but I haven't.
What mod are you talking about? Make sure you are adding the files one at a time and in all locations. That sounds like their is a problem when you add the YFT file. Open IV won't tell you if there is a problem if you add multiple files at once.