Let's all be friends here.
The rules clearly state what is and what is not allowed. Discussing no-cd patches is considered against the rules of this forum and will thus result in an edit or removal.
Back to the question.
I don't know much about the technical side, but I do know that certain things are also hardware dependant.
I understand you are trying to backup Desert Storm, but I missed the type of writer/reader you used to make the original backup.
Another possibility may be the use of virtual CD Rom software...but of that I know even less (search my be of help, if not in a direct answer, it might help you narrow things down)