@Reyser I ended up getting it to work.... It turns out the two cars just wouldn't go together I was trying to make a 2 car add on... A 458 Italia Liberty Walk and a Huracan Liberty Walk but they just can't coexist in the same dlc sadly.... Though I was able to get a Ferrari F12 TDF and the Huracan Liberty Walk in one dlc add on.. So I'm making progress I will be making another add on pack tommorow to see if I can get it to work consistently without crashing at loading screen or telling me "invalid models"

Hi I was attempting to put 2 cars in one add-on dlc for my game and after I followed all the steps everything loads... But when I try to spawn the car by typing in the model it tells me "invalid model" is there any way you can help?