It's been a while since I've come across proprietary disc image formats. Once again open source tools are forthcoming. Ubuntu has a command line tool called ccd2iso that comes in handy for dealing with .ccd/.img/.sub files.
As usual, install said package from terminal:
~$ sudo apt-get install ccd2iso
It's a small package so even dial-up users could install it in seconds. Conversion is a simple command away:
~$ ccd2iso foo.img bar.iso
The above will take foo.img and convert it into a ISO image called bar.iso. The other files need not be specified.
Dealing with uif files
Splitting cue/flac files
Converting cue/bin files to ISO