Can't rebadge

So hi i used the ETK I-Series as a car to rebadge into a VW ( AW ) so i changed all etk logos in the file and lettering DDS images but when i load up the game it shows the basic etk logos, anyone have a solution ? (idk why my pics turning blue)

 

You have to use something called materialoverride
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I dont really know how to use it since i got help from someone but it works just find out to how use it

 

You also have to change the main.materials file
Tutorial

 

thanks