A. If you don't have a separate partition to deploy Windows PE and Windows RE, you can take a WIM file containing Windows PE and Windows RE and boot.sdi (which is provided for each architecture in the Windows Automated Installation Kit) and add a boot configuration database entry to allow the WIM file to load into a RAM drive.

Place the machine architecture WIM file and boot.sdi at the root of the C drive. Then, use the following commands to create a RAM disk device:

bcdedit /create \{ramdiskoptions\} /d "Ramdisk options"
The entry \{ramdiskoptions\} was successfully created.
bcdedit /set \{ramdiskoptions\} ramdisksdidevice partition=C:
The operation completed successfully.
bcdedit /set \{ramdiskoptions\} ramdisksdipath \boot.sdi
The operation completed successfully.

You can now use this RAM disk to mount a WIM file. To use the RAM disk and the WIM file, you first need to create a new OSLOADER entry, then configure the entry with the globally unique identifier (GUID).

bcdedit /create /d "Windows RE" /application OSLOADER
The entry \{57f9d854-b1b2-11dc-9cfd-e2c6c11635e9\} was successfully created.
bcdedit /set \{57f9d854-b1b2-11dc-9cfd-e2c6c11635e9\} device ramdisk=\[c:\]\winre.wim,\{ramdiskoptions\}
The operation completed successfully.
bcdedit /set \{57f9d854-b1b2-11dc-9cfd-e2c2d840594d\} path \windows\system32\winload.exe
The operation completed successfully.
bcdedit /set \{57f9d854-b1b2-11dc-9cfd-e2c2d840594d\} osdevice ramdisk=\[c:\]\winre.wim,\{ramdiskoptions\}
The operation completed successfully. bcdedit /set \{57f9d854-b1b2-11dc-9cfd-e2c2d840594d\} systemroot \windows
The operation completed successfully.
bcdedit /set \{57f9d854-b1b2-11dc-9cfd-e2c2d840594d\} winpe yes
The operation completed successfully.
bcdedit /set \{57f9d854-b1b2-11dc-9cfd-e2c2d840594d\} detecthal yes
The operation completed successfully.
bcdedit -displayorder \{57f9d851-b1b2-11dc-9cfd-e2c2d840594d\} -addlast
The operation completed successfully.