Well Colossus if your using imageshack go to the image first, then click Embed thumnails of this image (in blue), then to the right of Forum you copy and then here click paste. Using this as an example.
Uploaded with ImageShack.us
If you don't want the last part "Uploaded with imageshack.us" and just the scan you don't have to add it, just delete it, it won't matter.