There is a PecmdExt.ini in the root of the Win8.1SE_x86.iso which apparently do nothing (created by ...Projects\Win8.1SE\Shell\0-Shell Loader.script).
What is it for?
PecmdExt.ini
CALL Keyboard
CALL ExtDrivers
CALL ExtPrograms
////////////////////////////////////////////////////////////////////////////////////////////////
_SUB Keyboard
// United State
//EXEC !%WinDir%\System32\Wpeutil.exe SetKeyboardLayout 0409:00000409
// French
//EXEC !%WinDir%\System32\Wpeutil.exe SetKeyboardLayout 040c:0000040c
// German
//EXEC !%WinDir%\System32\Wpeutil.exe SetKeyboardLayout 0407:00000407
// Portuguese Brazil
//EXEC !%WinDir%\System32\Wpeutil.exe SetKeyboardLayout 0416:00000416
_End
////////////////////////////////////////////////////////////////////////////////////////////////
_SUB ExtDrivers
//DEVI %WinDir%\inf\xxxxx.inf
_END
////////////////////////////////////////////////////////////////////////////////////////////////
_SUB ExtPrograms
// EXEC = Wait, @background, ! Hide. ex: EXEC =WaitNoHide.cmd, EXEC @!=WaitHide.cmd, EXEC NoWaitNoHide.cmd, EXEC @!NoWaitHide.cmd
//EXEC Y:\Programs\Sysinternals_Process_Monitor\procmon.exe
_END
////////////////////////////////////////////////////////////////////////////////////////////////
Thanks