Donwload and install this small software, is called hyperlobbby. Almost everybody who plays IL-2 on multiplayer use it.
http://hyperfighter.sk/modules.php?n...&orderby=dateA
Connect selecting IL-2 Sturmovik 1946.
There you will see lots of dogfight servers, some with patch 4.09, and some other with mods. You will to make sure to select a 4.09 to fly.
The rests i hope you will figure it out by your self
.
And its done!