Windows 7 boot process expained

[Jotto]

What i know so far is that Windows 7:

I'll skip the part where BIOS loads the boot sector of the cd/dvd/hdd or whatever which points to bootmgr

- bootmgr loads /boot/bcd

- bcd points to /sources/boot.wim

- boot.wim loads winloader.exe

What i know aswell is that Microsoft uses Windows PE environment to install their OSs (vista/7/server).

I want to understand the process, because i want to make PE environment which can install a .wim file with all 7 editions and vista. I know a method to create all 7 editions in one, but i want to add vista's aswell.

Thank you.

[cluberti]

If you use a Windows 7 PE environment, it can install Vista .WIMs without issue. However, if you mix them and try to boot with a Windows Vista PE environment, it can fail to apply one or the other. Make sure the proper .clg files are in the sources folder for all versions in your WIM, and use a Win7 source, and you should be OK to do this without any further changes.

[Jotto]

So i must use Windows 7 PE environment (windows pe 3.0)? But how exactly do i use the wim files to install them?