Here is information regarding a failure of livecd-creator. I'd be happy to test fixes as well.

Environment: F16 LXDE 32b spin totally updated (a VM running in VMware Player).

Goal: Build more up to date ISO of F16 LXDE

How:
  
- Used standard process, including standard fedora-live-minimization.ks, fedora-live-base.ks, fedora-livecd-lxde.ks.

- Modified to remove office tools and sound but nothing important

- Always run as root, plenty of disk space

This worked perfectly until about 2 weeks ago when an F16 update broke it.
It crashed out of Python at the end of the process.  Sorry, I didn't save
one of those.

So, I got the most recent livecd-tools (16.11) from git and installed (make
install). That installation seemed to be successful.

Now it fails in Python, but with a different error:

...
  Installing: vconfig                      ##################### [919/919] 
6872 blocks

Removing password for user root.
passwd: Success
Note: Forwarding request to 'systemctl enable NetworkManager.service'.
Note: Forwarding request to 'systemctl disable sshd.service'.
rm '/etc/systemd/system/multi-user.target.wants/sshd.service'
Traceback (most recent call last):
  File "/usr/bin/livecd-creator", line 210, in <module>
    sys.exit(main())
  File "/usr/bin/livecd-creator", line 194, in main
    creator.configure()
  File "/usr/lib/python2.7/site-packages/imgcreate/creator.py", line 724, in configure
    self._create_bootconfig()
  File "/usr/lib/python2.7/site-packages/imgcreate/live.py", line 242, in _create_bootconfig
    self._generate_efiboot(self.__ensure_isodir())
  File "/usr/lib/python2.7/site-packages/imgcreate/live.py", line 235, in _generate_efiboot
    isodir + "/isolinux/efiboot.img"])
  File "/usr/lib/python2.7/subprocess.py", line 493, in call
    return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1228, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory