maybe i'm a bit late and maybe you already got your answer.... but what the hell, i'll tell yah any way!
Okay... first go to this image, then hold control and click at the same time on the image and click "save as" then save it onto your desktop, OR if you have a dell put your mouse over the Art and click the left click button and click "save as" and save it to your desktop.
then go to your home page and go over to your icon, then click the little pencil(easy-peasy-lemon-squeeze). Then click upload image and select the dA art that you saved to your desktop. then when its loaded zoom up to the one you want, like the gravestone or the skeleton. Once you have it adjusted you have this!