You think people actually cut C4Ds by hand? 😛
With the full program you save it as a PSD, open it in Photoshop, and delete the alpha channel, which gets rid of the black background. As I can't save them, I can't do that.
Which really doesn't matter anyway because 99% of the time that you use a C4D it's going to be set to Lighten or Color Dodge or something like that, so the black will disappear anyway.
http://www.fileden.com/files/6132/narutotutorial.jpg
I've sold it for full rights though 😛