Please Help! No One Lives Forever back-up won't install (NOLF)

[Covey]

I made a back up of No One Lives Forever" (NOLF) Using CloneCD but when I try to use it to install the game, it asks for the orginal disk. Can someone please tell me how to get it to work? I made a .ccd file that I saved in "my documents" and I have Playback21 running (the yellow smily face is there by my clock, and Ihave tried it without the playback21 running) Plus I made a unpatched copy that I tried and got the same error message. I would really appreciate someones help!

The folders that Clone CD put on my computer are a .ccd , .img , and .sub


No One Lives Forever ~ Help!! ~ can't get it to download - says I need the original
Thanks!! :-)