http://www.gamedev.net/community/forums/topic.asp?topic_id=467902
I don't think this is released but it looks like something I was thinking of writing, only better. It's kind of like my autostitcher but for human-made screengrabs, relying on you to drop it in roughly the right place and then it "snaps" to the perfect position.
I had also thought of doing something like that after doing vgstitch. Hope he releases it.
I sent him a GameDev PM.