I don't know if it was mentioned earlier in the thread, but there is another way to restart your Kindle 2 that does not require holding the power switch for 15 seconds.
If you go to Menu, then Settings, and then Menu again, there is an option for restarting the Kindle2. It might be hard to miss, but it is cleverly named Restart
Thank you very much for the ability to change the sleep mode pictures, I am much happier to be able to add my own personal images, or at least pictures of authors that I like haha (bye bye Oscar Wilde)