Some one has probably answered all this for you as I slowly scroll down.
I updated this afternoon from Snow Leopard to Lion and it was a piece of cake. It first downloads a small app, about 700k, that handles it all for you. The 4G is RAM, which you need, I think.
Thanks. You know I haven’t even set a location whatever that means for my ITunes? What the heck is that and do you need it?
Did you back up your files?