Creating mods on edited vehicles

I know everything about the zip structure and how to make them, I just don't get how to make a mod on a vehicle edited in game. I edited and saved my vehicle in the parts selector menu but does that create a zip file for the edited vehicle and how can it be accessed?

 

If you need a step-by-step, i can provide that. And what exactly are you trying to do with the vehicle?

 

Om trying to use Fen's ricer covet mod to make a Ricer version of the Covet
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So i customized the Covet but I can't create a zip file of the saved vehicle.
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And also thank you for the help.