I believe the following contains all the information that you are looking for:
cat /media/iso/.disk/info Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.4)
I believe the following contains all the information that you are looking for:
cat /media/ iso/.disk/ info
Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.4)