I've tried to install BAT, but I think my GOG copy of IL2 is faulty. Best I could do was to get TGA going briefly. also, any plane that tries to take off from a carrier explodes. It doesn't matter if it's 4.10, 4.11, or 4.12.2. So, I'll try and d/l another version of IL2, and see how it goes. BAT looks like a fantastic idea. For WWI, I'll probably use DBW 1916, as it has the 4.10 Infantry. For everything else, I'll use BAT. Time could be an issue if I get an new job. Meanwhile thanks everyone for an excellent effort.