I am away from PE development last afew years. Have not followed the developments and when i search and read around i see i have not lost anything because there is not much improvement. I want to share my latest PE %100 handmade and pure as baked in its own oven for educational purposes. Maybe can be helpfull in developments. Because my best PE learning school is investigate what people do and how they do. If anybody interested he can learn everything about handmade PE making because when i investigate others i can see every hidden detail and if i can do others can do too.

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I want to share this PE unfinished and in my TURKISH language because

*i am working on it yet
*if i share finished people can try to use in production environment, in this condition it will be educational

What is missing in this PE
*Internet Connection
(Internet connection does not works Wired and Wireless keep in mind before download. In it is current state i guess netprofm service depends on Nlasrv and it is depends on Eventlog. They needs to be fixed. I stealed the current services from PE's around. Approximately to make a PE takes not much time for me. This took 1 week. But fixing services can take months. It is the most time consuming stuff for me.)
*Search function (Have not finished i will fix it)
*This PE does not load all drivers by itself, unlike windows 8 and 8.1. Maybe in windows 10 something changed. Maybe need some work
*Printers and devices (Need some extra files i do not know about its future)
*Change desktop wallpaper (Probably needs one or two file)
*Advaced system properties
*Login as admin or change user (Not implemented yet)
*When running some programs there is security warning (Internet explorer registry tweaks will solve it)

and others...

It can look like a long list and you can says what a sh*t. But if you have time interest and enough bathwidth you should give it a try. If you find better one from this give me link. Because i nearly downloaded all chineese stuff. They are number one in handmade PE building but i belive none of them is good enough and they will never be. I know their style and how they work.

And some positive stuff
*It is x64 bit with x86 bit support
*It is 276mb in size
*I did not used syswow64.exe, I guess it is used as getting x86 apps work. My PE builds never need syswow64 for years also winpe8 and winpe8.1. If it is used for any other thing i do not know maybe somebody can explain to me. syswow64.exe file is inside wim but you should add in pecmd.ini for get it work at boot.
*Double functionality and half size of winpese brother PE's :P
*Every file in PE is needed. You can not get it smaller without loosing functionality and the most size taking stuff is network files.

Links

EDIT: Links removed!

Come on. As i see you are are very active in this forum, also i see you on MDL alot. I guess you should be very experienced. Is this question is only a revenge for my previous open source question on other topics or you are really asking it? In anyway i will reply it.

PECMD is a chineese PE loader that is used in all PE projects. It is not my code. It is very powerfull and sometimes antivirus programs detect it as virus. It is nearly in all PE builds. SIW2 (User of this forum) shares updated PECMD frequently. If i had source code of it i will be glad to share. I remember that it's source code maybe distributed too because i see lots of different PECMD distibutions. It's author get angry after it is cracked and stopped developing it. So i guess he shared it's code that if any other people wants to improve it they could because so many different PECMD distributions around. And it continues to developing. I can be false thats all my knowledge. PECMD should be the only outside program used differently else than original code (I need to look wim for to be sure  ) You can remove it and change with winpeshl.exe HKLM\SYSTEM\Setup\Cmdlines registry key and use winpeshl.ini to load everything. In administrator loading PE's it does not need any but i again use to do loads of stuff. Mt PECMD.ini is the most easy code you can find inaround PE's. I can explain everyline is there if you want. Normaly i do not use netcfg.ece lines in there. My still of creating PE is using the full registry and using full services. When i do that i do not need to use netcfg.exe stuff and penetwork etc. All services loads automatically. As i said this is unfinished project and i am working on it yet. If you investigate winpese system32 directory and search for *.ini you can find lots of ini files that gets work lots of closed source autoit codes.

http://theoven.org/index.php?topic=590.msg20188;topicseen#msg20188

some reverse engineered source code stuff i found

https://github.com/liberize/pecmd-decrypt/tree/master/PECMD-v2.8.8U

For 32bit support is also should be side effect of using full registry stuff. Lots of years i said use full registry. Nobody listened me. After that they have to be used full registry because they have not got any other option. A chineese guy explained how to do that. Until that time i was using full registry but if he knows %100 i was know %99 maybe. Winpese was also started to use. This was maybe 2 years before.But when i look PE's around here they again lost their way and started to using spare reg files again. This can be also again side effect of development because windows changed. With windows 10 also services and files changed. I do not how to use full registry without gettting BSOD. I need to investigate and find a way if chineese do not explain before me. I do not see a light that they search for it now.

There is a wrong idea in all windows users mind. Less services means less process and more fast system. This is complately wrong. You should look this as a team work. More services has a good teamwork for to work flawless. Only you should disable some services that will never work inside pe. As i said i have stolen HKLM\SERVICES key from another place. Probably from a chineese PE or winpese. I have not had time to look it. Just original Services key gives BSOD. If anybody know exact services to disable i will be very glad.

Again if we come to your original question. For to get x86 support working. My idea should be
*Use full HKLM\Software\wow6432node
*Use full HKLM\Software\Microsoft\Windows\CurrentVersion\ComponentBasedServicing
*Use full HKLM\Software\Microsoft\Windows\CurrentVersion\SidebySide

and a few reg tweaks as
[HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Session Manager\KnownDLLs]
"DllDirectory32"=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,00,73,00,79,00,73,00,77,00,6f,00,77,00,36,00,34,00,00,\
  00

As i use full registry stuff i do not know function by function registry keys. Any keys can be. I can just guess it with my experiences.

If there will be enough demand. I can make a smartversion/xdelta patch of English version of same PE and share. But should be enough demand and i do not promise. To avoid to be used in production environment i will not share fixed version.

As the links are removed i will support this topic for a short period of time. Complately same system in English. Starangely Cortana window exposed itself. It is good that i can find which file result it.

I have not touched that registry. system32 and syswow64 files exactly same. Just found under syswow64 two files shcore.dll and shwapi.dll files different but they do not result such change. Changed all mui files does not help. Very strange both builds exactly same.

ChrisR your messagebox is full

Sorry i see your nick always and tought you are GURU and having fun with me.

Looks good vvurat 

You can get some pm from public in time 

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I am sharing my file list for extreme removal. You can add "copy" lines and make a batch file and easly create your own file list to build PE. (Change your language with tr-TR). You can build your WinPE with WinPeSE and extreme remove unneeded files.

Wireless icon needs some more files (Shouldn't be more then a few)
Search function can be need one or two file (Searches only in start menu and shows wrong result. mssvp.dll or prn001f.dll something like that files maybe need.)
There are all files needed to login as Administrator.
There are extra 5mb files for my extra programs. You can remove them.
%70 control panel works.
Supports x86 programs.
You can delete dism folder to save space.
Smaller then nanoserver.
296Mb boot.wim size.