I'm pretty sure you can install one disk, but i would also like some confirmation.
You can. A guy who uploaded a video on youtube just installed the third disk and didn't need to install the rest according to one of his replies.
EDIT: It was the third disk and it wasn't the video creator. Just some random reply, so yeah, take that as you will. Although I'm certain it works that way as you'd have to being fucking retarded to change the coding in such a way to make you install all of them. Granted I could see Microsoft doing that so people would buy larger HDD's too, so meh.
Edited by Draekon, 14 November 2008 - 12:35 AM.