As you asked, to post a picture without it ending up as a thumbnail, you need to host your picture. You can upload it here to a picture gallery in your user control panel or an online image poster (imageshack and photobucket are the most popular). Once youve done that, simply obtain the image tag and insert it inbetween the following code : [img] (this is where the image tag goes, no spaces allowed) [/img]
Practice it by using preview post.
Hope this helps
