How to create an ISO from directories on HD.

[alhava]

I seek to create an ISO from a directory on my hard drive. Short of the long:
Have game. Game GOOD! Game OLD! but game want CD. HAVE no cd :^(. Have all files! GOOD!
If I can emulate a CDrom drive with the files, in it, It will work. I have DAEMON tools, but they require an ISO, so How do I mak ean ISO out of the files on my Drive?
What other ways would you recommen going about this? I tried fakeCD, but it was giving me command line problems, refusing to acknowledge directories etc...
Any recommendations? thank you.