Woah thats one detailed model! Yeah, you can attach files, Click on "Use Full Editor" Then scroll few scrolls down and you see attach files, then just select the image from your PC, Remember: The file must not be .PNG, it didnt work on me. (-:, if you use imageshack, when you upload the pic, the other screen appears with all kind of links on it, search for thumbnail, and copy and paste it. I Hope you somehow understanded : D