You can also use MagicISO to check the content of a .iso file, and even modify it if you wish to. And it does not require the creation/utilisation of an emulated drive. I kinda suggest not to use too much of cd-rom emulation (even tought i do...) thingies, it is said to mess with some recent games (namely HL2 and Doom3 IIRC), and it's a pain in the behind to clean everything about those emulated drives.