to post a picture, you need to have it hosted someplace on the www.

I just make a small file, usually about 100kb or less, upload it in my post, then I'll download it (but copy the address), go to edit and then click on image down in the lower boxes, that will allow you to up load a picture on the NWP server (past address in the window prompt) and use it also as the host. It's a back door, but that's how i do it. . .