I can actually confirm that you can put the files in a folder called <car number> outside the Teams folder, just as we usually do.
Ive tried that but it only shows the blue car in the showroom
I edited a CAR file with my car number and took a set of windows and added the SROUK windscreen banner and put it in my file (is that right)
Edit: The SRouk windscreen banner is showing
so I've done something right. I did notice the blue skin in the TEXGTL file (no other skins are in there) all the others car skins are in the teams folder.
Cheers Ade