Hello!

I just received my hard copy of the game, installed it , activated it and installed patch2.
The game runs fine without the disc in the drive but I just read the manual and it states that the disc must be in the drive... what is true?
I would really prefer for the disc to be stored rather than having it in my drive.... is there a check later in the game (though I doubt it) or I can just put it back in it's box?
thanks!