Description of problem:

Creating a new VM doesn't work (Windows XP)

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

virt-manager-0.6.0-1.fc10.x86_64
libvirt-0.4.6-3.fc10.x86_64
python-virtinst-0.400.0-1.fc10.noarch

How reproducible:

Always

Steps to Reproduce:
1. select localhost in main virt-manager screen
2. New -> Forward 
3. System Name: winxp
4. Fully Virtualized, x86_64, kvm -> Forward
5. Local install media, OS Type: Windows, OS Variant: Windows XP -> Forward
6. ISO image location: /var/lib/libvirt/images/en_winxp_pro_with_sp2.iso -> Forward
7. Simple file, 10000MB, no allocation now -> Forward
8. Network all default -> Forward
9. Memory and CPUs all default -> Forward
10. Finish
  
Actual results:

Unable to complete install: 'Size must be specified for non existent path '/var/lib/libvirt/images/en_winxp_pro_with_sp2.iso''

Unable to complete install '<type 'exceptions.ValueError'> Size must be specified for non existent path '/var/lib/libvirt/images/en_winxp_pro_with_sp2.iso'
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/create.py", line 722, in do_install
    dom = guest.start_install(False, meter = meter)
  File "/usr/lib/python2.5/site-packages/virtinst/Guest.py", line 730, in start_install
    self._prepare_install(meter)
  File "/usr/lib/python2.5/site-packages/virtinst/FullVirtGuest.py", line 310, in _prepare_install
    distro = self.os_distro)
  File "/usr/lib/python2.5/site-packages/virtinst/DistroManager.py", line 264, in prepare
    self._prepare_cdrom(guest, distro, meter)
  File "/usr/lib/python2.5/site-packages/virtinst/DistroManager.py", line 215, in _prepare_cdrom
    transient=True)
  File "/usr/lib/python2.5/site-packages/virtinst/VirtualDisk.py", line 135, in __init__
    self.__validate_params()
  File "/usr/lib/python2.5/site-packages/virtinst/VirtualDisk.py", line 335, in __validate_params
    "existent path '%s'" % self.path))
ValueError: Size must be specified for non existent path '/var/lib/libvirt/images/en_winxp_pro_with_sp2.iso'
'

Expected results:

Should work :-)

Additional info:

I placed the XP iso in /var/lib/libvirt/images to avoid SElinux fuzz (why shouldn't you be able to select an ISO file from the Download folder anyway?!