ok..im not very good with these things but this is how i do with img or iso files that dont have that cue thing..(and i couldnt make them work with any other programs)
first you create .cue file like said earlier ...then you "load" it with Daemon-Tools and see if you can see your CD in My Computer
if its working then you can just burn it...
if its not then you change MODE1 --> MODE2 and if that didnt help, then 2352 --> to whatever the other # was