When you go into to the message part were you write look down into Additional Options and to manage attachments.
click on it and you can look around and choose the pic you want and upload it to the site.
Here's my RD Logics Mongoose/Team Magic G4S. It's my first gas on-road car. Drove it twice and already broken-in the engine. I like to have my body in one color, but there wasn't enough to paint the wing. So it's in a different color. Hope my taste isn't too bad
Thanks to my friend who helped me to build the car.