Thread:JoePlay/@comment-4347751-20121009190049/@comment-171752-20121010172439

Like Randomtime said, GIMP (a free alternative to Photoshop) can open Photoshop files (.psd), so if you install GIMP, you'll be able to use that template.

Without going into too much detail, the method I used on those circular portraits on the background at The Secret Circle Wiki is this:
 * Use the circular selection tool and set a specific diameter (for example: 150 pixels)
 * Make the selection around the actor's head and copy-paste it into a separate file
 * On the 'blending properties' (Photoshop term; you might have to figure out the GIMP equivalent), add the drop shadow effect, then set the distance to 0 and adjust the size