Adding sound to a special effect

It's probably quite simple but I know nothing about model editing really.
I want to add PossessionMissileLaunch to Corporeal Form <Caster> (Abilities\Spells\Orc\EtherealForm\SpiritWalkerChange.mdl).

If anyone could either do it for me or tell me how to do it myself, I'd <3 you.

Im gonna assume youre using Magos Editor.

If you are, you need to...
1. Open the Node Manager and Create and Event Object
2. Set type to SND (Sound)
3. Set data to APSL - Possesion Missile Launch

Thats all you need. (as far as I can remember)

Yeah, I'm using Magos.
Whenever I add the sound event object, the model doesn't show up ingame. And if I removed it and reimport, it does show up. What am I doing wrong?

EDIT: Found it, needed to give it an event track.

Thanks a lot :)