Just tell me which rate of fire do you want, I'll mod the file for you and upload it.
The realistic rate of fire during WW2 was 4 seconds. That's what I use!
If its 4 seconds you want, here it is:
http://rapidshare.com/files/116922551/GUNS_SUB.sim.html
If its not, tell me the value and I'll do it for you tomorrow... Now I'm off to bed, work ealy in the morning!