F.E.A.R. 1 no CD problems

[Boogershut]

I inserted F.E.A.R. disc 5 (the play disc) into my BD-ROM Drive and opened Daemon Tools Pro. I then clicked "Make Disc Image" and clicked "Start". After it had finished making the image I clicked the empty Drive G at the bottom and clicked "Mount" and selected F.E.A.R. from the list and it was mounted to the virtual Drive G. I ejected the F.E.A.R. disc from my BD-ROM drive and then went to "My Computer" and double clicked Drive G to run F.E.A.R. and the 'Options' (Play, Options, Uninstall, Readme) screen popped up but when I clicked "Play" a message came up that said "Original disc could not be found or authenticated."