huh?
if you are talking about wav. files then use the sound recorder taht comes with windows, it can add on, reverse it, make it faster, slower, louder, quiter, mix with other musics, insert other musics.
OR:
Use OSF.
OSF is a virtual sound thingy, or you can jsut use the game sounds. SCMdraft comes with this. you can also use SF by typnig in the name.
OR:
use an editor and upload the sound in...(theres a sound button somehwere, usually on the toolbar). then use play soundname(.wav) in the triggers.