1.) Right-click the image and 'Save as'. NO HOTLINKING! For ease of remembering who made the icon, save it with my s/n in the title such as 'ariel flowers by feathercait'.
2.) When uploading, type the image title in the 'Keywords' box and enter the following in the 'Comment' box: by < lj user='feathercait' > but without the spaces between the claw things. It should look like this: