Received the disc from Sony today (bought it on Sat). It's so quick. The disc's cover is written in English. So I think it can be installed in English like what mouseman said yeah.....
I doubt. Usually you have to buy the warranty once you have bought the machine. Are you in the UK as well? I could pass by the Sony shop this week and ask it for you if you want to know...For me, 1 yr world-wide warranty should be good enough....