Can someone explain to me why a home replacement is the way to go? Currently only using 3 screen, starting to get full, but so far so good. So what other features do replacement homes have that you guys find to be a distinct advantage over the regular home? I kind of like some of the themes out there, but isn't that essentially just a different background with custom icons? In theory can't I just download a custom icon packet (I'm guessing these exist??), and find a background I like and I am good to go? And what's with the docking bar?