Download hyperlobby client software from here
http://hyperfighter.sk/modules.php?name=Downloads
Install and select "IL-2 Sturmovik 1946" as game.
When you connect, you ingress the password you want and select the remember password, and once connected you will see all the people flying.
If you just bought the sim, remember to install 4.08m and 4.09m patches.
Check de dogfight servers, anyone that says 4.09m, you can fly on it. If it says mod of any kind, you will have to find on the web that mode.
I recomend at first you set a server and fly in there with your friends, and after that ventur online on other servers, to see how you a$s gets kicked over and over!

. Take it with humour and keep there, and sooner that you think you will find your self returning the favour