QUOTE(gboshort @ Nov 15 2006, 03:02 PM)
The disc that comes with the HD-DVD installs the same update as the Fall update that was just pushed from Live at the end of October (2006).
It updates the Dashboard to version 2.0.4532.0 which is identical to what the Fall Update does.
YMMV on whether or not this impacts your console (modded or original). Treat it with the same regard as you would the online update.
That may be true, but I already had the 10/06 Fall update and it still wanted me to run the install DVD. I ran the Fall 10/06 update on an unmodded Xbox 360. Flashed in the Xtreme 4.2A firmware then ran the HD DVD install DVD.
Don't know if the HD DVD installer actually installed anything. I just know that it was required before the HD DVD player will work. And that it worked on an Xtreme 4.2A modded Xbox 360.