diff -rup virtinst-0.500.4/virtinst/Installer.py new/virtinst/Installer.py
--- virtinst-0.500.4/virtinst/Installer.py	2010-08-23 16:05:33.000000000 -0400
+++ new/virtinst/Installer.py	2010-12-09 15:08:43.924740000 -0500
@@ -343,8 +343,8 @@ class Installer(object):
             return True
 
         if (disk.driver_type and
-            disk.driver_type not in [disk.DRIVER_TYPE_AIO,
-                                     disk.DRIVER_TYPE_QEMU]):
+            disk.driver_type not in [disk.DRIVER_TAP_RAW,
+                                     disk.DRIVER_QEMU_RAW]):
             # Might be a non-raw format
             return True