Backup of Call Of Duty

I've just got a copy of call of duty and I was wondering how 2 back it up I've looked at the protection and it's safedisk 2.9 which I haven't come across.Iam also running a Pioneer DVR-104 drive which I believe it is a "1 Sheep burner". my usual process is that I dump the image on my harddrive using alcohol 120% then use the image buring wizzard to burn the backup image.And most of the game I've used this method has worked but I was just wondering if I should change any detail in proceding to make a backup of this game.