Description of problem: Revisor doesn't work because there is a setup problem
for the yum respository


Version-Release number of selected component (if applicable):


How reproducible:100%


Steps to Reproduce:
1.Start revisor
2.Select options for a USB thumb drive
3.Select /usr/share/livecd-tools/livecd-fedora-8-desktop.ks
The f7 .ks does work either
  
Actual results:


Expected results:


Additional info: The error messages are,

The directories Revisor uses in /var/tmp/ already exist. This could possibly
hold data from a previous run. Please remove or move them to a safe location,
then confirm to continue. If you do not move or remove the files, Revisor will
simply delete them.
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/revisor/load_kickstart.py", line 206,
in button_forward_clicked
    self.store_options()
  File "/usr/lib/python2.5/site-packages/revisor/load_kickstart.py", line 172,
in store_options
    repoObj = yum.yumRepo.YumRepository(repo["name"])
NameError: global name 'yum' is not defined