If the static IP cannot be assigned manually and comes with an error : element not found.

Compile the boot package with necessary NIC drivers .

Reboot the client computer and quit out of Ghost.

Please run the commands in command prompt in order :

netcfg -winpe
wpeutil InitializeNetwork
netsh interface ipv4 set address "Local Area connection" static <IP address>  <subnet mask>  <gateway> 1

It is a driver issue. Please add the NIC driver.