Ambient sound editing?

[xid]

Can someone tell me how to change the ambient sounds in Quake to my own sounds. I did it awhile ago, but now I dont remember how I did it. I remember thought that the sound file needed to be in a certain sound format and frequency and also that it had to be looped. At the time i downloaded a dos utility that would take a sound file and loop it making an ew file for you, but I no longer have this. So anyone know how to go about this?

[xid]

Never mind figured it out.