complete new to stegano...1
read the description of stegano on the page with all the links to the pics, that pretty much gets you past the first one. Stegano is more creative than almost all the hacking youre gonna do, its all about puting info in a media file (ie music, pics, movies) and using that file to hide the info, some of the steg challenges require knowledge of other stuff (hexidecimal…… bla bla bla) good luck;)
Steganography is not only to hide information in media files, but just about anything. There is a way to retrieve the hidden information for any of the pictures (in this case, they are all pictures). Your job is to find that way and find the hidden information which is the password you will enter for the according challenge. There are articles written for challenges in the Articles section.