Hello, I'm planning to install Win 7 64bit and have it, hopefully, peacefully coexist with Win XP 32bit. (Yes, my PC can handle 64bit) I've been reading a lot about this, but I'm swamped by details and versions and stuff! Here's what I'd like to know: 1) When making a partition for Win 7, how much space do I need? On C: I have WinXP installed and the disk is almost full. On D: I have 90 GB free (out of 370). If I allocate, e.g. 20 GB to the partition for the Win 7 installation, when I use Win 7, will I have access to all the free space that's there for Win XP too (that is, more than 20 GB)? I know, silly question, but still.. If I partition D: will all on it be deleted? 2) I want Win 7 64bit, but don't know which version. What would you recommend as easiest-to-activate and best for gaming? 3) I assume I need an ISO of Win7 on USB or on DVD, can't simply install it from the computer? Thanks!