First, go to "My Computer", then open up "Program Files" and find a folder called "EA Games". In there, you will find a folder called "Command & Conquer Generals Zero Hour". Open it up.
(Or just type "C:\Program Files\EA Games\Command & Conquer Generals Zero Hour" into the bar with the text like on your internet browser).
Then, copy everything in this folder, and paste it into another one, preferably in "My Documents"
Now, you will have the files from the game in this folder. Any time you want the original game back, delete all the files in your Command and Conquer Zero Hour folder, and copy the files in this folder, into your main Command and Conquer Generals Zero Hour folder.
Edited by Høbbes, 25 March 2008 - 03:27.