iPXE with FOG and SCCM 2016, wim not loading all the way

[NiKiZe]

If I understand it correcly you have modified:
winpeshl.ini to point to bootstrap.vbs ?

What happens here is that once bootstrap.vbs exits it also triggers winpe to exit
So most likely the vbs script fails.

It might be easier to use cmd/bat files, just having pause at the end of the file will give you time to read the error before exit.
see http://ipxe.org/howto/winpe

For debugging purposes I usually have a

Code:

start cmd

in the beginning of that file - this opens a new separate cmd prompt for ease of debugging (there is always shift+F10, but sometimes it is easier to have it open by default.