Please open the backup in WHS console on another machine. Select volume C: and select the folder with the Windows Home Server drivers. Copy this folder to an USB drive. Insert the USB drive on the machine you want to restore. When the dialog for the detected devices is shown click to search for additional drivers.
Should this procedure fail to load your NIC drivers then please read this article here:
http://social.microsoft.com/Forums/en-US/whsfaq/thread/b14e3cf2-7b02-4569-8c26-c75b7a58d6e7. This applies to some other network cards also (for example Broadcom).
LightsOut - Power Management for Windows Home Server http://www.home-server-blog.de/add-ins/lightsout/#en