I do not completely understand your question.
Is it a program that is currently installed on your PC that you want to backup by copying the files to CD or DVD? If so, this is not likely to work, because installation also installs files in other directories (e.g. Windows/system).
I would suggest that you try to make a backup of the original disc. YOu might want to check it for any copy protection to see if you need a special program to back it up (tutorials can be found in various sections of this forum).