ADDING new liveries to an unlocked model?

[Yard1]

So, I have zmodeler, unlocked model and desire to add more liveries. Is it possible? I only know a bit about zmod, but can somebody help me? I only want to add more skins. Oh, and is it also possible to have more than 4 of them?
translator

[uncfire]

I was wondering the same thing. Was wanting to add more liveries to one of the firetrucks.

[Bxbugs123]

you can only have 4