ISO image files are more convenient than .cue/.bin pairs in that they can be easily mounted in the loopback device in linux.
This task can be accomplished with bchunk, which you can get from here or from your distro's software source (such as synaptic for debian)
Simply install bchunk and type in a terminal (supposing you have the pair image.bin/image.cue, you will get image01.iso):
$ bchunk image.bin image.cue image
Enjoy your new .iso file!
