Description of problem:

During the installation of a Windows guest by virt-install the first
part of installation will proceed without any problem, but the next part of Windows (which requires a reboot) the CDROM will be automatically disconnected.

How reproducible:
======================
virt-install --accelerate --hvm --connect qemu:///system --name win2k3-x86_12 --network bridge:virbr0 --file=/dev/sdd3 --cdrom=/kvm-data/WinSvr_2005_R2_ENT_1of2.iso --vnc --ram=1024

How to fix?
=================
To proceed with the Windows installation without CDROM disconnecting, is required to to use --os-type windows, like:

virt-install --accelerate --hvm --connect qemu:///system --name win2k3-x86_12 --network bridge:virbr0 --file=/dev/sdd3 --cdrom=/kvm-data/WinSvr_2005_R2_ENT_1of2.iso --vnc --ram=1024 --os-type windows

Finally can we also, document an optional option as well:
--os-variant 

Further optimize the guest configuration for a specific operating system variant. This parameter is optional.

Thanks
Douglas