I'd like to remove the stock wallpaper images that appear on the Thunderbolt when you place your phone in dock mode. I have a cradle that holds the phone in landscape orientation and as soon as I drop the phone into the cradle, my wallpaper starts rotating with pictures of a woman I don't know, somebody's dog, various photos like mountains and other scenery appear from a stock art collection. It's annoying to be forced to look at these pictures. Do I have to root my phone to gain access to these images so I can delete them and replace them with images of my own or is there an app or setting that will work as a work-around so I don't have to root my phone? This is my single most annoying feature of the Thunderbolt. A close second is the bloatware but that by itself doesn't annoy me enough to root my phone for the removal of the pre-loaded junk. Thanks in advance!