For the Lark Doll Quilt Contest, you have to make a Flickr account, which is free. Upload your pictures. Flickr is a great way to organize all your pictures.
Then you have to join the contest group to be able to add up to two pictures. To join the group there's a "Join the Group" option under the title:
http://www.flickr.com/groups/1786781@N23/
Hope that helps. And I hope everyone is navigating the new board a bit easier each day. I know I could use more practice!