There's an easier way to do it now, and the old way doesn't seem to work much anymore...
All you need to do now is copy and paste (but sometimes even this doesn't work..it depends on if the image is software-protected by the host site)
1) right-click on the picture
2) select "copy" from the pop-up menu
3) right click in your CC post where you want it to appear
4) select "paste"