Is it possible to duplicate images in LittleSnapper?
LittleSnapper keeps it's images in special library file, so the only way to copy images is to do the long way that you described.

I'd recommend you get on the LittleSnapper discussion board over at RealMac to add your voice to the group of users who'd also like to get at their images in a more flexible way.

http://support.realmacsoftware.com/discussions/littlesnapper/