I am slowly but steadily uploading all these pictures, and a few others, to my Flickr account, where they are to be found in a collection of their own. They are uploaded in print size and some of them have been adjusted a fair bit since I published them here. I recommend that you use the versions found there, rather than theese. They are still under a CC license and free to use.
I have also created a Flickr group for the congress. Add your pictures there, but please give them some kind of CC license.