I created this a while back, but haven't really tested it much since I didn't have a real need for it. But it is fairly complete and provides the command line options for genisoimage.
If anybody can test this and report any issues, I would be very grateful.
python > 2.5, python-gtk > 2.16 , genisoimage
To use, simply checkout a local copy of the git repository or optionally download the master.tar.gz file and run the script biagen