many of these apps already exist, some examples:
full (image) backup as you described it - like norton ghost, so to speak - get an app called 4EXT from the Android Market - it's $2 and absolutely fabulous!
screenshot - an app called Screenshot It - perfect!
Yes, both of these example apps require ROOT - as most of the great apps do!
People: root your phones and quit pussyfooting around, having a non-rooted phone is like having a Windows computer that you only have a guest account on, rather than full administrator privileges - Go to the XDA website, like over 40 million XDA visitors before you and read up! - Learn what you are doing and then DO IT (or at least have your geeky friend do it for you and pay him well!) - Start controlling your phone rather than being a slave to its silly stock limitations and rules!
I promise you will thank me, once you MAN UP and get this done and begin to enjoy all of these apps that you are just WISHING for on this list!
http://forum.xda-developers.com/wiki/index.php 
