Updating the boot.ini alone won't solve this problem. Unfortunately, I have to agress with StueyB and say that this isn't possible. There are just too many places that would need to be updated in order to "move" the OS to another partition, plus there is always the issue with Windows not liking to copy/move system files that are in use. You'd almost have to install another OS just to attempt the move. I wish there was a better way, but I sure can't think of one (and I've looked into it in the past when I've screwed it up myself).