moh?patch

[mal]

i have the moh game,with bought disk.i play the game with the disk in,and no cd patch.i notice that people put the upgrade patch in the folder,i think it is the 1.11,not sure.what i would like to know is,what is the upgrade patch for?does it make the game run better,or updates the game,or do you need the patch for running the nocd patch?all advice welcomed.