Hi, well a preview would be always good, but you can always do a backup of what you have in your GPS and put on another folder on your disk, then delete the one in your GPS, then add the new ones that you download on the GPS, that way you will see what you download at the moment without seeing the olders ones. Its what I usually do.
Thanks for the heads up about the vehicle list. I didn't know it existed. (As a new member of this site I'm still learning my way around.)
About a preview, not sure how to do it except to download the vehicle file and install it in the GPS to see how it looks. If it isn't liked it can just be deleted. But a way of previewing would be nice.