or should it be to locations only
This can be the tricky part.
Most of the time the track makers will .zip or .rar (simply a file compression type) the track they made with only the folders required to be placed in your locations folder. You don't need to make any new folders.
I will use the Bathurst track as an example. You download the file "Bathurst_GSCEx_V1.03.rar"
Open the file "Bathurst_GSCEx_V1.03.rar" and you see a folder named "Bathurst" .Open the compressed file (with WinRAR I assume but other apps can do it too)...
Now you have several ways to move forward from this point.
Open a file browser (windows explorer) to your "..\Stock Car Extreme\GameData\Locations" folder... you will see all the track folders currently installed (in the right side window pane).
You now have two windows open. The compressed file, and the windows explorer with the locations folder.
Drag and drop the "Bathurst" folder from the WinRAR window... to the windows explorer window.
Now you need to be careful at this point... drag the "Bathurst" folder to some open white space on the right hand side window (not into an existing track folder). Alternately you can drag the "Bathurst" folder to the left hand window pane and drop into the "Locations" folder.