Traffiq Addon: Custom UV maps

Hi guys
Does anyone know why its SO hard to add a custom map to the Traffiq models?
I laid out the UVs and then made a simple diffuse map (to test) and then added Texture Coords but my custom texture does not show up. If I use “object” for the co-ords it does show but not with the UVs.
I did click “editble” before spawning the object. Any help would be great.

SOLVED

I got a reply from the creator. I just had to use one of the pre-existing UV map slots. Apparently Blender can have 8 per model.