Step 3- Download the ISO (which would be the information, called an image, ripped directly from a disk)(again, duh)
Step 4- Run Daemon Tools
Step 5- Access the D-Tools menu, and go to "Virtual CD/DVD-ROM". Select a drive for it to mount (insert the virtual CD into), and find and select the ISO.
Step 6- Run your emulator. Iit specefies which system it's for. Here's a REALLY good place for emulators)
Step 6- Select the drive with the ISO in
Step 7- PLAY! Oh, and in case of slowness... well, Youtube's your pal for that.