Description of problem:

Firstboot module has been revamped in RHEL-6 and RHN modules are still using older classes. As of beta-1 firstboot will skip any screens that use "firstboot_module_window". This module from what I can tell has been removed from firstboot.

Firstboot's loader if failing to import, checks for any modules that use firstboot_module_window and skip it like so,

except ImportError as e:
            if str(e).find("firstboot_module_window") != -1:
                logging.error(_("Skipping old module %s that has not been updated.") % module)

Debugging Further I noticed the error to be:

firstboot 1.110 exception report
Traceback (most recent call last):
  File "/usr/sbin/firstboot", line 180, in <module>
    config.moduleList = loadModules(config.moduleDir, config.mode)
  File "/usr/lib64/python2.6/site-packages/firstboot/loader.py", line 86, in loadModules
    raise e
ImportError: No module named firstboot_module_window

You will see warnings like the following:

firstboot ERROR: Skipping old module rhn_register_firstboot_gui_window that has not been updated.
firstboot ERROR: Error loading module rhn_register_firstboot_gui_window:
No module named firstboot_module_window
firstboot ERROR: Skipping old module rhn_create_profile_gui that has not been updated.
firstboot ERROR: Error loading module rhn_create_profile_gui: 

Version-Release number of selected component (if applicable):
# rpm -qa|grep rhn-setup
rhn-setup-0.9.3-2.el6.noarch
rhn-setup-gnome-0.9.3-2.el6.noarch