If I knew how, I could post a couple of "Post Crash" photos of the car...
When you go to post a reply, there's a place at the bottom that says "Attach:" and to the right of that there is a little box that says "Browse..."
Click on the Browse box and find the picture file on your computer that you want to post. When you double click on that file it will attach it to your reply message.
To add a second photo (or more), click on "more attachments" to the right of "Browse..." and you should be able to do the same thing as above.
Then click "Post" at the bottom of the page after you have included any message that you want to accompany the photos. Let me know if that doesn't work for you.