Hi,
I have the sound from a 40mm Bofors gun when they are shooting with a Swedish Strf-9040.
Since it is not possibly to add mp3 or Wav files as file attachment is the file zipped.
Just unzip the file and put the sound file under your sound map in the WinsSPMB map, and put the sound 250 in the mobhack on Strf-90.
cheers/
niklas