Windows PXE install
The site http://www.rrzn.uni-hannover.de/anl-waikpxe.html has a nice description on how to get Windows PE in both 32 and 64 bit flavours booted from PXE. Installing Windows through a PXE booted environment can substantially improve the installation speed compared to the traditional DVD based approach.
There is one minor drawback with this PXE boot environment: it does not boot using UEFI, thus Windows can not be installed on GPT formatted drives.
An alternative would be to use FOG, instead of a manually configured PXE boot system.