Hi Baltika,
Yes I followed Wrench's separate era specific install guidelines, so I changed the dates accordingly, so I can't say if they were necessary or not for WOE to work. I also added era music files from one of the other addons and now that the weapons work I have a flyable WW2 install. I still have a few things to sort out though, I can't click on instant action as that wants an F-15 which has been removed, also for some reason the missions aren't selectable even though I have 2 there. I don't know if it's possible to modify the sound levels of weapons, but I find the Spitfire machine guns almost silent, I had to look outside to see if they were firing. I need to change some load screens to rid myself of modern warplanes in this install. I also installed the large group mod to get swarms of He-111, but that may have been a mistake as frame-rates suffer when you come in for the kill. I need to fine tune control inputs too, pitch sensitivity is too high for me to line up easily, but that is setup specific stuff. I've actually only just bough WoE, so it's all new to me, saw your WW2 mod and had to try it out :)
Thanks very much for working on this for all of us to enjoy.
Allan