Now that we've reached the RTM milestone with Hyper-V (and why I'm actually on vacation), here's the updated script for how to add the Hyper-V synthetic drivers to WinPE (original post here)

%echo off

set MSUSOURCE=D:\synth\rtm\amd64

set PESOURCE=D:\winpe_x64_synthetic

mkdir %temp%\IC

c:\windows\system32\expand.exe -F:* %MSUSOURCE%\Windows6.0-KB951634-x64.msu %temp%\ic

mkdir %temp%\IC\binaries

c:\windows\system32\expand.exe -F:* %temp%\ic\Windows6.0-KB951634-x64.CAB %temp%\ic\binaries

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_wnetvsc.inf_31bf3856ad364e35_6.0.6001.18016_none_b337f91d87dbf1d0\wnetvsc.inf %PESOURCE%\mount\Windows

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_ws3cap.inf_31bf3856ad364e35_6.0.6001.18016_none_f2e1ba67fcb48f61\ws3cap.inf %PESOURCE%\mount\Windows

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_wstorflt.inf_31bf3856ad364e35_6.0.6001.18016_none_1cadbbeed0ad55a3\wstorflt.inf %PESOURCE%\mount\Windows

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_wstorvsc.inf_31bf3856ad364e35_6.0.6001.18016_none_836399a4204c4863\wstorvsc.inf %PESOURCE%\mount\Windows

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_wvmbus.inf_31bf3856ad364e35_6.0.6001.18016_none_959a72f36267838a\wvmbus.inf %PESOURCE%\mount\Windows

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_wvmbushid.inf_31bf3856ad364e35_6.0.6001.18016_none_4ccff81064c7c78f\wvmbushid.inf %PESOURCE%\mount\Windows

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_wvmbusvideo.inf_31bf3856ad364e35_6.0.6001.18016_none_af52382097951fd7\wvmbusvideo.inf %PESOURCE%\mount\Windows

"C:\Program Files\Windows OPK\Tools\PETools\peimg.exe" /inf=%temp%\IC\binaries\amd64_wvmic.inf_31bf3856ad364e35_6.0.6001.18016_none_5dfb8c2804cc9e9a\wvmic.inf %PESOURCE%\mount\Windows