Just go to your Gradient Tool, and Select the Radial Gradient. You can have the settings to whatever you like, I prefer an overlay or soft light setting, sometimes normal but on a low opacity. Whatever looks best! Make sure Reverse is not selected, and dither and transparency IS selected. Then all you have to do is experiment! Make sure It's on a new layer so you don't mess up. Hope this helps! If you have anymore questions let me know!
Thank you for informing me! I'm finding this very disgusting people don't have the common sense to not steal others work, and now I'm going to have to start slapping big ugly water marks over them. :c I'll see what I can do to help remove the pieces!