Hi,

I try everything but working option is only from forum nexus mod

www.nexusmods.com/fallout3/mods/20371/

You need register to get the file.
Don't check any pay option (it's optional) - it's free.

Its about one file - the insiders know that a single dll file is important

It's not smart and secure to install DLL files downloaded from "some sites". To make game work you just need DirectX 9 and you can take it directly from Microsoft:
https://www.microsoft.com/en-us/download/details.aspx?id=8109

:>