A few useful links for you:
A Climber's Guide to Yosemite
http://home.comcast.net/~e.hartouni/climbing/ACGttHS/ACGttHS.html
Valley Scrambles
http://www.summitpost.org/valley-scrambles/157844Abandoned trails and off-trail hikes near Yosemite Valley
http://yosemitenews.info/forum/read.php?3,26491,26491#msg-26491