Eh, havent people mentioned it?
IL2 1946 is unmodable apart from the Campaign scripts & Skins
if you where looking for a modable game you should have gone with CFS3 which you can mod about anything as MS released its SDK.
Maddox games, didnt allow the game to be modded the reason why, I dont know but if you look at the game , it really doesnt need much apart from the campaign. the flight model is very good, the planes damage model is good as it really is when you lose something or get holes it effects your flight.
also patch it up too 4.08m
and test if it runs without the DVD(it does seem in some cases it will work without the DVD inserted)