I currently use CloneCD/Alcohol (moving over to Alcohol currently) to mount my CD Images.

You see I used to have a duplicate CD case for every one of my Applications/Games. Eventually I gave that up and started moving the duplicated to CD Images on External USB/Firewire enclosures. I then have duplicate USB/Firewire enclosures for backup.

The problem is that I need to be able to mount these images under linux without using emulation. If I have to I will use Vmware but I'd prefer to mount them locally....so does anyone know of a linux CD Emulator that's compatible with Alcohol/Cloned Images?

I'm not 100% sure on the options, but you can actually just mount the .iso files as if they were filesystems.

something to the effect of:

mount -o iso9660 loop file.iso /mnt/whatever

try the man pages for mount and verify the options needed.