Sound Mods

Ok now that mods can be discussed here on our forum, can anyone tell me:

How do we open the data files to get a look at the sounds?

I know some people know how do do this already and i hope you wont keep this info to yourselves, because of course the more people who know how to do these sort of things, the better the quality of Mods we will have when the SDK finally gets released.

Thanks