[santobr]

My game is 1946 Steam.
The only two things are...
After the download completes, you need to move the entire directory il 2 sturmovik 1946 inside the Steam directory to another place.
Then you search in google, download and copy the nocd il2fb.exe and il2setup.exe in the same directory.

Then you do the same like everybody does:
Download and install the update 4.08m.
Download here and install the UI 1.1, patch UI 1.1.1 and finally UI 1.2.
Wow!
I think this is all.

Enjoy the world of moded IL-2.