Tyro, if you haven't already...
create a folder in your sounds directory titled f4u1d.
place these sounds in the directory, from your sounds folder
m2.wav
m2_2.wav
m2_3.wav
m2_4.wav
m2_5.wav
Now open sound recorder which can be found in Programs, Accessories
Open each of those sounds and reduce the volume and save them.
Now u have quiter volume f4u1d gun sounds.
This can be done for every sound in AH individually
I have used this method to increase the volume of flaps cuz I need to know they are activating.
AKskurj