If you're in Windows, go to that site in you're talking about. Right-click your image and click "save picture as" or "save image as," and select a location on your computer. Then go to your profile, click upload, and use the little "browse" button to choose the image. Then click upload, and you're there.
In the future, and this is directed at everyone, please contact me directly when you have a "question for Jeff."
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Jeff
Webmaster/Guide to The Point