Am thinking about trying to install the Truecrypt hidden OS option, just to play a bit. If I use Windows Vista, how can I install two copies of it on the same machine without the key being flagged by Microsoft? If I am running two versions from the CD that doesn't include latest updates, won't the software try to update right after installation? Basically, doesn't it violate my user agreement if I install it in two places? (btw, I have a laptop with linux/xp dual-booted and am thinking of using that instead, but wanted to try it on the vista machine too). Thanks!