I have made a back-up copy of Call of Duty and Lock On with CD Clone.
However when I tested these copies they came up with the error message:
Please insert the correct CD-ROM, select OK and restart application. I know I can obtain a 'no cd' crack for these games but that is not what I need.
I would appreciate any help.

Does your drive read other discs? (I know it sounds like a dumb question, I'm just trying to narrow things down).