1. I got 64bit compitable cpu and 2GB RAM, what should I use? 32bit version or 64bit? 2. whats the difference between RTM(7600.16385.090713-1255_x86/64fre_client_en-us_Retail_Ultimate-GRMCULFRER_EN_DVD) and media refresh(X17-59463/5) versions? and what should I use? 3. for gaming purpose, if I chooise not to install any new hardware(such as RAM), what should I use? 32bit or 64bit? and RTM or media refresh?