I have recently begun to try and create my own vehicle for gta 4 and have created 1 tahoe with 1 lightbar and it worked. So, I tryed my luck again and started to make a Chevy Silverado Police Truck but with multiple lights. I have finished the truck and have everything in the spot where I want it, but when I went to export it to my desktop so I could put it into gta 4 through open IV zmodeler tells me that there are duplicate "extras". I am not sure how to fix this. Could someone take a look at it and let me know what is wrong, or possibly fix it so it can be used in-game.
Link to mediafire download for the .z3d file and the textures for all items: http://www.mediafire.com/?bkmyiije489vez6