Running an iso as a file; not from a cd - if anyone knows?

I am trying to find a program or script or something that can run an iso as a file rather than burning the iso to disk. In vmware you can actually mount the iso to the cd drive and view the iso on a quest OS, but I don't want to do this everytime I want to use an iso. I don't want to run vmware everytime I want to use an iso. If anyone knows how to use an iso like a file, or knows what kind of programs that will do this (for free! and not partially working like shareware) I would be most appreciative! Thanks all!

Hi - Is this thread any use to you?

Simply awsome! Thanks!:D

mount -o loop -t iso9660 {insert label of iso here}.iso /mnt/iso

To help others to with this same question here's the command that I used.