HaloMods "Classic" Read-only Archive

I was wondering. Is there a program that converts any type of sound file into the correct ADPCM halo PC format? i really want to put my own sounds into halo, but i dont know how

Barber did you do a search? I am pretty sure I have seen this topic somewhere in this area or somewhere else around here.

i searched..and got nothing that worked.

i'm pretty sure there's a tut on this