下载imdisk：

http://www.ltr-data.se/opencode.html/
http://www.ltr-data.se/files/imdiskinst.exe

将下载到的压缩包里的文件按需提取：（以X64WinPE为例）

imdisk2.0.10.rar\imdiskinst\cpl\amd64\imdisk.cpl

imdisk2.0.10.rar\imdiskinst\cli\amd64\imdisk.exe

imdisk2.0.10.rar\imdiskinst\svc\amd64\imdsksvc.exe

以上文件放到system32目录；

imdisk2.0.10.rar\imdiskinst\awealloc\amd64\awealloc.sys

imdisk2.0.10.rar\imdiskinst\sys\amd64\imdisk.sys

以上文件放到System32\drivers目录；

导入注册表：

将WinPE的system文件挂载到HKLM\123

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\123\ControlSet001\Services\AWEAlloc]
"Type"=dword:00000001
"Start"=dword:00000002
"ErrorControl"=dword:00000000
"ImagePath"=hex(2):5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
  74,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,44,00,52,\
  00,49,00,56,00,45,00,52,00,53,00,5c,00,61,00,77,00,65,00,61,00,6c,00,6c,00,\
  6f,00,63,00,2e,00,73,00,79,00,73,00,00,00
"DisplayName"="AWE Memory Allocation Driver"
"Description"="Driver for physical memory allocation through AWE"

[HKEY_LOCAL_MACHINE\123\ControlSet001\Services\ImDisk]
"Type"=dword:00000001
"Start"=dword:00000002
"ErrorControl"=dword:00000000
"ImagePath"=hex(2):5c,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
  74,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,44,00,52,\
  00,49,00,56,00,45,00,52,00,53,00,5c,00,69,00,6d,00,64,00,69,00,73,00,6b,00,\
  2e,00,73,00,79,00,73,00,00,00
"DisplayName"="ImDisk Virtual Disk Driver"
"Description"="Disk emulation driver"

[HKEY_LOCAL_MACHINE\123\ControlSet001\Services\ImDskSvc]
"Type"=dword:00000010
"Start"=dword:00000002
"ErrorControl"=dword:00000000
"ImagePath"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,\
  74,00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,69,\
  00,6d,00,64,00,73,00,6b,00,73,00,76,00,63,00,2e,00,65,00,78,00,65,00,00,00
"DisplayName"="ImDisk Virtual Disk Driver Helper"
"ObjectName"="LocalSystem"
"Description"="Helper service for ImDisk Virtual Disk Driver."

附上2.0.10汉化版