Indeed. I deleted my earlier post at it was not fit for purpose.
However, there is an alternative:
Dowload SFS Extractor
here.
In that .7z(open
with 7zip, I recommend it over WinZip or WinRar) archive is "filelist.txt", a list of every file IL2 contains within its sfs archives. One caveat: This list is from 2010, so there is no accounting for accuracy or completeness.
This is what SFS extractor uses to find its files, so those are the only ones you'll be able to extract. Unless you find another list.
This tool allows you to extract all files from the .sfs archives in your IL2 installation directory.
Be aware the fully extracted contents take up over 12GB(the size of my incomplete extraction), so make sure you have enough hard drive space.
I tried posting only the list of .wav and .prs files, but the forum won't allow 60000+ characters, so you'll have to look them up.