I enjoyed reading the articles and watching the video and not to take the wind out of the sails, I look at both sides. This doctoring could be done by anyone. For example a birther who wants to discredit the other side could doctor a picture and leave something like the hand out just to cast doubt to show an attempted cover-up. As obvious as that hand is, how could someone have missed that and gone to all the trouble of everything else? Sorry, I just don't buy it.
I have done a lot of work on photos and know that it is a tedious job that requires concentration and a keen eye for detail. Anyone that was good enough to do the rest of the picture would never miss that detail!