Steam with Disc Version

[timholt]

Pardon my ignorance but; I have just pre-ordered the collectors version to get all the goodies as well as the game. As I (don't) understand from what I have read (but unable to find an answer to this question), will I have to down load and use Steam to access the updates to COD?

Also, I am assuming because the game can be downloaded - once installed from the disc it will not be necessary to use the disc again after the initial installation?