Vehicle with two variable textures

[mmods]

Hi! I write this to ask if someone knows how to create a vehicle with more than one textures like GTA V original ambulances. What i want to do is have one ambulance models but with two textures. Thank u.

[Reacon]

@mmods the majority of ambulance mods on this site have more than one texture to them

[mmods]

And can they be used at same time?