SL8a

This is what comes up when its at the stage of actually loading the game.
The destination (C:\Program Files\Activision\Call of Duty 4 - Modern Warfare\)you have selected does not have 8000MB of space available.Please continue the installation using the custom setup and select a different destination.So I do and create a new folder because all existing ones do not have 8000MB of space including the new folder.