Welcome to the forum, James.
Let's get started.
If this is the first time you want to mod the game, and you don't know what to do, so this is my suggetion
First, Install the IL-2 1946 stock, version 4.07.
Then, install this:
https://www.sas1946.com/main/index.php/topic,38443.0.htmlIt will upgrade your stock game to the newest version 4.12.2.
Now install the mod activator for your game. Without it, you can't mod your game. This is SAS's ModAct 5.3 for v4.12.2 game:
https://www.sas1946.com/main/index.php/topic,37662.0.htmlRead the thread carefully, it's very helpful. There is a mod called AI Flyable in that thread, it will make all of your AI stock planes controlable, B-17/24/29... Superb!
After install modact, now you can mod your game, adding new plane, new map, ship and everythings
Read this thread to know how to install them:
https://www.sas1946.com/main/index.php/topic,35719.0.htmlHave fun