1) Using an Image Editing program in your personal computer (such as Paint Shop Pro, Aldus Photo Styler, Adobe Photo Shop, Corel Photo Paint, MS Photo Editor...) create your .jpg image (for example mytank.jpg). It should be less than 600 pixels wide in order to be viewed entirely on the screen by most internet users. Wider images require people to scroll sideways on their browsers which is annoying. Also, the image file should ideally be less than 50 kBytes in size in order to have reasonable loading time. DO NOT blindly upload and post the default high-resolution images created by your digicam or scanner, they will almost certainly violate both the conditions above. You need to edit them before they can be of reasonable size for webpages.
Click browse and find the file you want to upload then select "open" and the location of it will be entered into the box, then just click "Post New Topic"