adding files to images. can it be done?

[exalos]

can I somehow add a file or folder into an already made clonecd image?
I recently bought Red Alert 2 which had the safedisk v2 protection but also with read errors on it. so I did manage to do a clonecd image of the game and also made the fix.exe with unsafedisk.
Now all I want is to somehow add the fixed exe into the backup cd.
I cannot coppy the files of the cd to a temp folder because it contains read errors. first of all thank you for reading my question, problem, and again thank you if you know what can i do. I was hoping there was any software that would allow me to add files to the clonecd image.