to fix it find a model in the GTA 5 that contains all extras
let down to the folder with your model and open model that has all the extras
then renew ZModeler3 and open your model, and you will have happiness
I had the same problem due to the fact that ZModeler3 not understand
extra until I uploaded model in which there is extra from 1 to 12
and yet if you do not understand what I have written contact via Skype, I'll show you how to fix it, I do not know English but I can turn the screen demonstration
and show and you yourself will understand everything when you load stondartnuyu model of GTA 5 is ZModeler3 loads scripts that are found in models of GTA 5