Add .iso CD-IMG As Deb REPO

The easiest way to add the image as a software source is to burn it to a CD/DVD. You then need to go to System -> Administration -> Software Sources, click 'Other Software' and click 'Add CD-ROM...'.

If you want to use the ISO image as a software source without burning it, the process will be a bit more complicated. You will need to open a terminal Applications -> Accessories -> Terminal and run these commands:

sudo mkdir /aptoncd-mountpoint

sudo mount /media/USB/aptoncd.iso ~/aptoncd-mountpoint -oloop

sudo apt-cdrom -d=/aptoncd-mountpoint add