If you want to add new photos, or videos about your car, you have only to add a new post (like this) in this topic.
A new topic, or thread, is opened when you want to start a new conversation about other arguments.
Instead, when you want to add a new idea, a new answer, a new photo and so on, you can only add a post.
I wish I'm clear...and I'm sorry for my terrible english :grinser021: