Go to the Fmod site:
http://www.fmod.org/download/
Install and go through the readme. It's going to take a certain level of expertise, but it's not too hard to figure out I think.
EDIT: There is also an educational section, training, and YouTube Videos.
I can't express without drooling, how incredibly awesome this sounds (no pun intended).
Please, please, please (envoke's James Brown) please..... have someone do a brief explanation of what files and where you will need them for alpha
Currently, I did notice that the plane engine sound only seems to work properly between 0 - 50 mph.