did you check to see if your nic has the appropriate driver when windows boots up?
if the nic doesn't have a driver assigned then the installation cannot continue past the scripted install
You don't need to include configure target os, it is included with scripted install allready.
Did you add
to the guiunattended section of your unnatend script?
The following two patches may be related to this issue. And they are both included in LDMS 8.8 sp1. If you are already on 8.8 sp2 we need to look other things then.
This could be a name resolution issue as well. I've had the exact same issue when there were no driver issues at all when the client couldn't resolve the core server name. may be something work checking as well.