Windows 2012 R2 Black Screen

[NiKiZe]

Not that it should matter but loading of bootmgr is unecessary (it will only be used if named bootmgr.exe but is normally extracted by wimboot)

You might want to try with the original boot.wim from the original iso instead just to make sure that is working.

Aha .. vmware and multiple emulated cores?, I think that is a known issue that has not yet been resolved, try on real hardware or with only one emulated core instead. (I remember this being reported on IRC and maybe somewhere on the forum as well)

Searching i found this: http://forum.ipxe.org/showthread.php?tid=8115