Erm, you need a description.ext file..
Get chris's OFP script editor, or DialoGG (Both in the editors depot, or email me and I'll send you DialoGG, as I'm not 100% sure where I got got it, but it's on this computer)
You just copy the files to the mission folder, like My Mission.Intro
And make a new folder called Sounds
And paste them into there
Run DialoGG, and point to that folder, it makes up everything you need to use the Unitname say "mysound"
Gd luck
- Ben