I was starting to get annoyed with my nackground pic everywhere. So i did some snooping: All you need is lockbox(duh) and mobilefinder Go into mobilefinder and find your target image. It canbe any format. copy the picture into your library folder. Rename it LockBackground.jpg It will automatically replace the existing background file Viola! You have changed lockbox's background! Happy modding! EDIT: after you install an app and springboard restarts your ipod background will be changed to the one ypu selected, but it is really quick and easy to fix it.