Well, I am not sure what to say as any ‘warez’ type questions are frowned upon, but, just for clarification.
Cue files go with bin files not ISO’s. You can check/convert/extract files from bins/iso’s, etc, using tools such as IsoBuster, WinISO, or just use Daemon tools to mount the image and check the contents out with explorer.
There are some ISO’s created (not games, as I am not into that as I do not have the time), that even IsoBuster or WinIso would not touch. Using Daemon tools to mount the image, I could copy the mpg file from the virtual image to HD and then convert that from .dat to .mpg (proper).
I am also of the mind that any such ‘dodgy’ ISO’s you are talking about are fakes - especially ones so small.