Have you ever needed to run something before the WDS client start the Windows Setup… Like a diskpart script to get rid of som pesky utility partitions… then read on..
The first obvious solution is of course to use WDS and MDT 2008 together, and have the MDT Task Sequence handle the partitioning etc…
But what if you (for some odd reason) want to use WDS, and only WDS… Well you can simply add a RunSynchronous command to your WDS Client Unattend.xml file.
Here is a sample: