Hi,
I'd like to submit this Red Eye remorer tool
It is Freeware, and makes a good job in removing "red eyes" in pictures.
As far as I have tested it, it appears portable.
You install it, copy the directory in another location, and uninstall.
I have found no remaining line in the registry after such operation (but maybe i missed one)
Web Site: http://www.vicman.net/