I understand, we do have also strange network boot issues, with a cycling aleatory reboot 1mn timeout reboot (Blue screen), before starting the TFTP to load the PXE. After a while, it is working. I sniffer packet to have a check, nothing at all, I do not see any difference. It is like from time to time, the Dell PC don't run the PXE loading sequence...
So we do have also the abilities with DS 6.9 to create boot image file, using "Boot disk manager" application, and generate boot image we can build a CD or an USB key... Can be usefull.
Notice, the WinPE 5 building process is integrating the Microsoft Windows ADK 8.1. Have to download and run 3GB for installing only 300MB of the WinPE 5 (DISM tool + Windows SIM) from Microsoft before WinPE or preboot integration possible.
Linux preboot option not so bad regarding the "complexity" Microsoft is building around Windows Deployment Tools... We are far away from a simple SYSPREP. Windows System Image Manager (SIM) need to be a specialization himself... Hey guys, make it more simple !!
I hope the GSS 3.0 will integrate a more simple installation process for WinPE, the latest DS 6.9. We can help if you need, we already do that a lot...