-The image has an empty root password and will not have networking
-configured by default. Set the root password before you configure
-networking.
+.B bootsize
+is not recommended when using
+.B extlinux
+- use grub instead.
+Versions of grub2 in wheezy
+can fail to install in the VM, at which point vmdebootstrap will fall back to
+extlinux. It may still be possible to complete the installation of grub2 after
+booting the VM as the problem may be related to the need to use loopback
+devices during the grub-install operation. Details of the error will appear in the
+vmdebootstrap log file, if enabled with the \-\-log option. Note that
+.B grub-legacy
+is not supported.