@Wayne-Workman I am able to get it to work too. Used this: https://technet.microsoft.com/en-us/library/dn613857.aspx to add all network drivers (got around 40 laptops here) and created 2 samba shares on the FOG server. One to the installation folder (where I got win7, win8 and win10) and one to the same folder with write rights. This way I am able to alter the installations from my pc and create an unattended.
scrolling down shows me you beat me to it 
@Wayne-Workman @Quazz already on it. Mounted the disk with DISM
dism /Mount-Image /ImageFile:“c:\temp\winpe\x86_64\media\sources\boot.wim” /index:1 /MountDir:“c:\temp\winpe\x86_64\mount”
navigated to Windows\System32\startnet.cmd
It already contains wpeinit. Do not change that line, but add your code after that.
Mine so far is
net use z: \x.x.x.x\isos\win7
net use x: \x.x.x.x\isos\win8
net use y: \x.x.x.x\isos\win10
menu.bat
now creating a menu in a separate batch file
So after that I created a menu.bat in the system32 folder with
http://www.sevenforums.com/tutorials/78083-batch-files-create-menu-execute-commands.html
to start the setup of different windows versions. Now I only have one PE box and 3 Windows installs. The next step is to automate the installations.